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NETCONF Working Group                                          K. Watsen
Internet-Draft                                           Watsen Networks
Intended status: Standards Track                           March 8, 2020
Expires: September 9, 2020

NETCONF Client and Server Models
draft-ietf-netconf-netconf-client-server-18

Abstract

This document defines two YANG modules, one module to configure a
NETCONF client and the other module to configure a NETCONF server.
Both modules support both the SSH and TLS transport protocols, and
support both standard NETCONF and NETCONF Call Home connections.

Editorial Note (To be removed by RFC Editor)

This draft contains many placeholder values that need to be replaced
with finalized values at the time of publication.  This note
summarizes all of the substitutions that are needed.  No other RFC
Editor instructions are specified elsewhere in this document.

This document contains references to other drafts in progress, both
in the Normative References section, as well as in body text
throughout.  Please update the following references to reflect their
final RFC assignments:

o  I-D.ietf-netconf-keystore

o  I-D.ietf-netconf-tcp-client-server

o  I-D.ietf-netconf-ssh-client-server

o  I-D.ietf-netconf-tls-client-server

Artwork in this document contains shorthand references to drafts in
progress.  Please apply the following replacements:

o  "XXXX" --> the assigned RFC value for this draft

o  "AAAA" --> the assigned RFC value for I-D.ietf-netconf-tcp-client-
server

o  "YYYY" --> the assigned RFC value for I-D.ietf-netconf-ssh-client-
server

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o  "ZZZZ" --> the assigned RFC value for I-D.ietf-netconf-tls-client-
server

Artwork in this document contains placeholder values for the date of
publication of this draft.  Please apply the following replacement:

o  "2020-03-08" --> the publication date of this draft

The following Appendix section is to be removed prior to publication:

o  Appendix B.  Change Log

Status of This Memo

This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79.

Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF).  Note that other groups may also distribute
working documents as Internet-Drafts.  The list of current Internet-
Drafts is at https://datatracker.ietf.org/drafts/current/.

Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any
time.  It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress."

This Internet-Draft will expire on September 9, 2020.

Copyright (c) 2020 IETF Trust and the persons identified as the

This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents
(https://trustee.ietf.org/license-info) in effect on the date of
publication of this document.  Please review these documents
carefully, as they describe your rights and restrictions with respect
to this document.  Code Components extracted from this document must
include Simplified BSD License text as described in Section 4.e of
the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.

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1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   4
2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   4
3.  The NETCONF Client Model  . . . . . . . . . . . . . . . . . .   4
3.1.  Tree Diagram  . . . . . . . . . . . . . . . . . . . . . .   4
3.2.  Example Usage . . . . . . . . . . . . . . . . . . . . . .   6
3.3.  YANG Module . . . . . . . . . . . . . . . . . . . . . . .   9
4.  The NETCONF Server Model  . . . . . . . . . . . . . . . . . .  20
4.1.  Tree Diagram  . . . . . . . . . . . . . . . . . . . . . .  20
4.2.  Example Usage . . . . . . . . . . . . . . . . . . . . . .  22
4.3.  YANG Module . . . . . . . . . . . . . . . . . . . . . . .  29
5.  Security Considerations . . . . . . . . . . . . . . . . . . .  41
6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  42
6.1.  The IETF XML Registry . . . . . . . . . . . . . . . . . .  42
6.2.  The YANG Module Names Registry  . . . . . . . . . . . . .  42
7.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  43
7.1.  Normative References  . . . . . . . . . . . . . . . . . .  43
7.2.  Informative References  . . . . . . . . . . . . . . . . .  44
Appendix A.  Expanded Tree Diagrams . . . . . . . . . . . . . . .  45
A.1.  Expanded Tree Diagram for 'ietf-netconf-client' . . . . .  45
A.2.  Expanded Tree Diagram for 'ietf-netconf-server' . . . . .  69
Appendix B.  Change Log . . . . . . . . . . . . . . . . . . . . .  94
B.1.  00 to 01  . . . . . . . . . . . . . . . . . . . . . . . .  94
B.2.  01 to 02  . . . . . . . . . . . . . . . . . . . . . . . .  94
B.3.  02 to 03  . . . . . . . . . . . . . . . . . . . . . . . .  94
B.4.  03 to 04  . . . . . . . . . . . . . . . . . . . . . . . .  94
B.5.  04 to 05  . . . . . . . . . . . . . . . . . . . . . . . .  95
B.6.  05 to 06  . . . . . . . . . . . . . . . . . . . . . . . .  95
B.7.  06 to 07  . . . . . . . . . . . . . . . . . . . . . . . .  95
B.8.  07 to 08  . . . . . . . . . . . . . . . . . . . . . . . .  95
B.9.  08 to 09  . . . . . . . . . . . . . . . . . . . . . . . .  95
B.10. 09 to 10  . . . . . . . . . . . . . . . . . . . . . . . .  96
B.11. 10 to 11  . . . . . . . . . . . . . . . . . . . . . . . .  96
B.12. 11 to 12  . . . . . . . . . . . . . . . . . . . . . . . .  96
B.13. 12 to 13  . . . . . . . . . . . . . . . . . . . . . . . .  97
B.14. 13 to 14  . . . . . . . . . . . . . . . . . . . . . . . .  97
B.15. 14 to 15  . . . . . . . . . . . . . . . . . . . . . . . .  97
B.16. 15 to 16  . . . . . . . . . . . . . . . . . . . . . . . .  97
B.17. 16 to 17  . . . . . . . . . . . . . . . . . . . . . . . .  97
B.18. 17 to 18  . . . . . . . . . . . . . . . . . . . . . . . .  97
Acknowledgements  . . . . . . . . . . . . . . . . . . . . . . . .  97
Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .  98

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1.  Introduction

This document defines two YANG [RFC7950] modules, one module to
configure a NETCONF [RFC6241] client and the other module to
configure a NETCONF server.  Both modules support both NETCONF over
SSH [RFC6242] and NETCONF over TLS [RFC7589] and NETCONF Call Home
connections [RFC8071].

2.  Terminology

The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
"OPTIONAL" in this document are to be interpreted as described in BCP
14 [RFC2119] [RFC8174] when, and only when, they appear in all
capitals, as shown here.

3.  The NETCONF Client Model

The NETCONF client model presented in this section supports both
clients initiating connections to servers, as well as clients
listening for connections from servers calling home, using either the
SSH and TLS transport protocols.

YANG feature statements are used to enable implementations to
advertise which potentially uncommon parts of the model the NETCONF
client supports.

3.1.  Tree Diagram

The following tree diagram [RFC8340] provides an overview of the data
model for the "ietf-netconf-client" module.

This tree diagram only shows the nodes defined in this module; it
does show the nodes defined by "grouping" statements used by this
module.

Please see Appendix A.1 for a tree diagram that illustrates what the
module looks like with all the "grouping" statements expanded.

module: ietf-netconf-client
+--rw netconf-client
+---u netconf-client-app-grouping

grouping netconf-client-grouping
grouping netconf-client-initiate-stack-grouping
+-- (transport)
+--:(ssh) {ssh-initiate}?
|  +-- ssh

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|     +-- tcp-client-parameters
|     |  +---u tcpc:tcp-client-grouping
|     +-- ssh-client-parameters
|     |  +---u sshc:ssh-client-grouping
|     +-- netconf-client-parameters
+--:(tls) {tls-initiate}?
+-- tls
+-- tcp-client-parameters
|  +---u tcpc:tcp-client-grouping
+-- tls-client-parameters
|  +---u tlsc:tls-client-grouping
+-- netconf-client-parameters
grouping netconf-client-listen-stack-grouping
+-- (transport)
+--:(ssh) {ssh-listen}?
|  +-- ssh
|     +-- tcp-server-parameters
|     |  +---u tcps:tcp-server-grouping
|     +-- ssh-client-parameters
|     |  +---u sshc:ssh-client-grouping
|     +-- netconf-client-parameters
+--:(tls) {tls-listen}?
+-- tls
+-- tcp-server-parameters
|  +---u tcps:tcp-server-grouping
+-- tls-client-parameters
|  +---u tlsc:tls-client-grouping
+-- netconf-client-parameters
grouping netconf-client-app-grouping
+-- initiate! {ssh-initiate or tls-initiate}?
|  +-- netconf-server* [name]
|     +-- name?                 string
|     +-- endpoints
|     |  +-- endpoint* [name]
|     |     +-- name?                                     string
|     |     +---u netconf-client-initiate-stack-grouping
|     +-- connection-type
|     |  +-- (connection-type)
|     |     +--:(persistent-connection)
|     |     |  +-- persistent!
|     |     +--:(periodic-connection)
|     |        +-- periodic!
|     |           +-- period?         uint16
|     |           +-- anchor-time?    yang:date-and-time
|     |           +-- idle-timeout?   uint16
|     +-- reconnect-strategy
|        +-- start-with?     enumeration
|        +-- max-attempts?   uint8

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+-- listen! {ssh-listen or tls-listen}?
+-- idle-timeout?   uint16
+-- endpoint* [name]
+-- name?                                   string
+---u netconf-client-listen-stack-grouping

3.2.  Example Usage

The following example illustrates configuring a NETCONF client to
initiate connections, using both the SSH and TLS transport protocols,
as well as listening for call-home connections, again using both the
SSH and TLS transport protocols.

This example is consistent with the examples presented in Section 2
of [I-D.ietf-netconf-trust-anchors] and Section 3.2 of
[I-D.ietf-netconf-keystore].

========== NOTE: '\' line wrapping per BCP XXX (RFC XXXX) ===========

<netconf-client
xmlns="urn:ietf:params:xml:ns:yang:ietf-netconf-client"
xmlns:ct="urn:ietf:params:xml:ns:yang:ietf-crypto-types">

<!-- NETCONF servers to initiate connections to -->
<initiate>
<netconf-server>
<name>corp-fw1</name>
<endpoints>
<endpoint>
<name>corp-fw1.example.com</name>
<ssh>
<tcp-client-parameters>
<keepalives>
<idle-time>15</idle-time>
<max-probes>3</max-probes>
<probe-interval>30</probe-interval>
</keepalives>
</tcp-client-parameters>
<ssh-client-parameters>
<client-identity>
<public-key>
<local-definition>
<algorithm>rsa2048</algorithm>
<public-key-format>ct:ssh-public-key-format</pub\
lic-key-format>
<public-key>base64encodedvalue==</public-key>

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<private-key-format>ct:rsa-private-key-format</p\
rivate-key-format>
<private-key>base64encodedvalue==</private-key>
</local-definition>
</public-key>
</client-identity>
<server-authentication>
<ca-certs>
<truststore-reference>trusted-server-ca-certs</tru\
ststore-reference>
</ca-certs>
<server-certs>
<truststore-reference>trusted-server-ee-certs</tru\
ststore-reference>
</server-certs>
</server-authentication>
<keepalives>
<max-wait>30</max-wait>
<max-attempts>3</max-attempts>
</keepalives>
</ssh-client-parameters>
<netconf-client-parameters>
<!-- nothing to configure -->
</netconf-client-parameters>
</ssh>
</endpoint>
<endpoint>
<name>corp-fw2.example.com</name>
<tls>
<tcp-client-parameters>
<keepalives>
<idle-time>15</idle-time>
<max-probes>3</max-probes>
<probe-interval>30</probe-interval>
</keepalives>
</tcp-client-parameters>
<tls-client-parameters>
<client-identity>
<certificate>
<local-definition>
<algorithm>rsa2048</algorithm>
<public-key-format>ct:subject-public-key-info-fo\
rmat</public-key-format>
<public-key>base64encodedvalue==</public-key>
<private-key-format>ct:rsa-private-key-format</p\
rivate-key-format>
<private-key>base64encodedvalue==</private-key>

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<cert>base64encodedvalue==</cert>
</local-definition>
</certificate>
</client-identity>
<server-authentication>
<ca-certs>
<truststore-reference>trusted-server-ca-certs</tru\
ststore-reference>
</ca-certs>
<server-certs>
<truststore-reference>trusted-server-ee-certs</tru\
ststore-reference>
</server-certs>
</server-authentication>
<keepalives>
<max-wait>30</max-wait>
<max-attempts>3</max-attempts>
</keepalives>
</tls-client-parameters>
<netconf-client-parameters>
<!-- nothing to configure -->
</netconf-client-parameters>
</tls>
</endpoint>
</endpoints>
<connection-type>
<persistent/>
</connection-type>
<reconnect-strategy>
<start-with>last-connected</start-with>
</reconnect-strategy>
</netconf-server>
</initiate>

<!-- endpoints to listen for NETCONF Call Home connections on -->
<listen>
<endpoint>
<name>Intranet-facing listener</name>
<ssh>
<tcp-server-parameters>
</tcp-server-parameters>
<ssh-client-parameters>
<client-identity>
<public-key>
<local-definition>
<algorithm>rsa2048</algorithm>

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<public-key-format>ct:ssh-public-key-format</public-\
key-format>
<public-key>base64encodedvalue==</public-key>
<private-key-format>ct:rsa-private-key-format</priva\
te-key-format>
<private-key>base64encodedvalue==</private-key>
</local-definition>
</public-key>
</client-identity>
<server-authentication>
<ca-certs>
<truststore-reference>trusted-server-ca-certs</trustst\
ore-reference>
</ca-certs>
<server-certs>
<truststore-reference>trusted-server-ee-certs</trustst\
ore-reference>
</server-certs>
<ssh-host-keys>
<truststore-reference>trusted-ssh-public-keys</trustst\
ore-reference>
</ssh-host-keys>
</server-authentication>
</ssh-client-parameters>
<netconf-client-parameters>
<!-- nothing to configure -->
</netconf-client-parameters>
</ssh>
</endpoint>
</listen>
</netconf-client>

3.3.  YANG Module

This YANG module has normative references to [RFC6242], [RFC6991],
[RFC7589], [RFC8071], [I-D.kwatsen-netconf-tcp-client-server],
[I-D.ietf-netconf-ssh-client-server], and
[I-D.ietf-netconf-tls-client-server].

<CODE BEGINS> file "ietf-netconf-client@2020-03-08.yang"

module ietf-netconf-client {
yang-version 1.1;
namespace "urn:ietf:params:xml:ns:yang:ietf-netconf-client";
prefix ncc;

import ietf-yang-types {
prefix yang;

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reference
"RFC 6991: Common YANG Data Types";
}

import ietf-tcp-client {
prefix tcpc;
reference
"RFC BBBB: YANG Groupings for TCP Clients and TCP Servers";
}

import ietf-tcp-server {
prefix tcps;
reference
"RFC BBBB: YANG Groupings for TCP Clients and TCP Servers";
}

import ietf-ssh-client {
prefix sshc;
revision-date 2020-03-08; // stable grouping definitions
reference
"RFC CCCC: YANG Groupings for SSH Clients and SSH Servers";
}

import ietf-tls-client {
prefix tlsc;
revision-date 2020-03-08; // stable grouping definitions
reference
"RFC DDDD: YANG Groupings for TLS Clients and TLS Servers";
}

organization
"IETF NETCONF (Network Configuration) Working Group";

contact
"WG Web:   <http://datatracker.ietf.org/wg/netconf/>
WG List:  <mailto:netconf@ietf.org>
Author:   Kent Watsen <mailto:kent+ietf@watsen.net>
Author:   Gary Wu <mailto:garywu@cisco.com>";

description
"This module contains a collection of YANG definitions
for configuring NETCONF clients.

Copyright (c) 2019 IETF Trust and the persons identified

Redistribution and use in source and binary forms, with
or without modification, is permitted pursuant to, and

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subject to the license terms contained in, the Simplified
BSD License set forth in Section 4.c of the IETF Trust's
Legal Provisions Relating to IETF Documents

This version of this YANG module is part of RFC XXXX
(https://www.rfc-editor.org/info/rfcXXXX); see the RFC
itself for full legal notices.;

The key words 'MUST', 'MUST NOT', 'REQUIRED', 'SHALL',
'SHALL NOT', 'SHOULD', 'SHOULD NOT', 'RECOMMENDED',
'NOT RECOMMENDED', 'MAY', and 'OPTIONAL' in this document
are to be interpreted as described in BCP 14 (RFC 2119)
(RFC 8174) when, and only when, they appear in all
capitals, as shown here.";

revision 2020-03-08 {
description
"Initial version";
reference
"RFC XXXX: NETCONF Client and Server Models";
}

// Features

feature ssh-initiate {
description
"The 'ssh-initiate' feature indicates that the NETCONF client
supports initiating SSH connections to NETCONF servers.";
reference
"RFC 6242:
Using the NETCONF Protocol over Secure Shell (SSH)";
}

feature tls-initiate {
description
"The 'tls-initiate' feature indicates that the NETCONF client
supports initiating TLS connections to NETCONF servers.";
reference
"RFC 7589: Using the NETCONF Protocol over Transport
Layer Security (TLS) with Mutual X.509 Authentication";
}

feature ssh-listen {
description
"The 'ssh-listen' feature indicates that the NETCONF client
supports opening a port to listen for incoming NETCONF
server call-home SSH connections.";

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reference
"RFC 8071: NETCONF Call Home and RESTCONF Call Home";
}

feature tls-listen {
description
"The 'tls-listen' feature indicates that the NETCONF client
supports opening a port to listen for incoming NETCONF
server call-home TLS connections.";
reference
"RFC 8071: NETCONF Call Home and RESTCONF Call Home";
}

// Groupings

grouping netconf-client-grouping {
description
"A reusable grouping for configuring a NETCONF client
without any consideration for how underlying transport
sessions are established.

This grouping currently doesn't define any nodes.";
}

grouping netconf-client-initiate-stack-grouping {
description
"A reusable grouping for configuring a NETCONF client
'initiate' protocol stack for a single connection.";
choice transport {
mandatory true;
description
"Selects between available transports.";
case ssh {
if-feature "ssh-initiate";
container ssh {
description
"Specifies IP and SSH specific configuration
for the connection.";
container tcp-client-parameters {
description
"A wrapper around the TCP client parameters
to avoid name collisions.";
uses tcpc:tcp-client-grouping {
refine "remote-port" {
default "830";
description
"The NETCONF client will attempt to connect
to the IANA-assigned well-known port value

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for 'netconf-ssh' (830) if no value is
specified.";
}
}
}
container ssh-client-parameters {
description
"A wrapper around the SSH client parameters to
avoid name collisions.";
uses sshc:ssh-client-grouping;
}
container netconf-client-parameters {
description
"A wrapper around the NETCONF client parameters
to avoid name collisions.";
uses ncc:netconf-client-grouping;
}
}
}
case tls {
if-feature "tls-initiate";
container tls {
description
"Specifies IP and TLS specific configuration
for the connection.";
container tcp-client-parameters {
description
"A wrapper around the TCP client parameters
to avoid name collisions.";
uses tcpc:tcp-client-grouping {
refine "remote-port" {
default "6513";
description
"The NETCONF client will attempt to connect
to the IANA-assigned well-known port value
for 'netconf-tls' (6513) if no value is
specified.";
}
}
}
container tls-client-parameters {
must "client-identity" {
description
"NETCONF/TLS clients MUST pass some
authentication credentials.";
}
description
"A wrapper around the TLS client parameters

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to avoid name collisions.";
uses tlsc:tls-client-grouping;
}
container netconf-client-parameters {
description
"A wrapper around the NETCONF client parameters
to avoid name collisions.";
uses ncc:netconf-client-grouping;
}
}
}
}
} // netconf-client-initiate-stack-grouping

grouping netconf-client-listen-stack-grouping {
description
"A reusable grouping for configuring a NETCONF client
'listen' protocol stack for a single connection.";
choice transport {
mandatory true;
description
"Selects between available transports.";
case ssh {
if-feature "ssh-listen";
container ssh {
description
"SSH-specific listening configuration for inbound
connections.";
container tcp-server-parameters {
description
"A wrapper around the TCP server parameters
to avoid name collisions.";
uses tcps:tcp-server-grouping {
refine "local-port" {
default "4334";
description
"The NETCONF client will listen on the IANA-
assigned well-known port for 'netconf-ch-ssh'
(4334) if no value is specified.";
}
}
}
container ssh-client-parameters {
description
"A wrapper around the SSH client parameters
to avoid name collisions.";
uses sshc:ssh-client-grouping;
}

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container netconf-client-parameters {
description
"A wrapper around the NETCONF client parameters
to avoid name collisions.";
uses ncc:netconf-client-grouping;
}
}
}
case tls {
if-feature "tls-listen";
container tls {
description
"TLS-specific listening configuration for inbound
connections.";
container tcp-server-parameters {
description
"A wrapper around the TCP server parameters
to avoid name collisions.";
uses tcps:tcp-server-grouping {
refine "local-port" {
default "4334";
description
"The NETCONF client will listen on the IANA-
assigned well-known port for 'netconf-ch-ssh'
(4334) if no value is specified.";
}
}
}
container tls-client-parameters {
must "client-identity" {
description
"NETCONF/TLS clients MUST pass some
authentication credentials.";
}
description
"A wrapper around the TLS client parameters
to avoid name collisions.";
uses tlsc:tls-client-grouping;
}
container netconf-client-parameters {
description
"A wrapper around the NETCONF client parameters
to avoid name collisions.";
uses ncc:netconf-client-grouping;
}
}
}
}

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} // netconf-client-listen-stack-grouping

grouping netconf-client-app-grouping {
description
"A reusable grouping for configuring a NETCONF client
application that supports both 'initiate' and 'listen'
protocol stacks for a multiplicity of connections.";
container initiate {
if-feature "ssh-initiate or tls-initiate";
presence "Enables client to initiate TCP connections";
description
"Configures client initiating underlying TCP connections.";
list netconf-server {
key "name";
min-elements 1;
description
"List of NETCONF servers the NETCONF client is to
maintain simultaneous connections with.";
leaf name {
type string;
description
"An arbitrary name for the NETCONF server.";
}
container endpoints {
description
"Container for the list of endpoints.";
list endpoint {
key "name";
min-elements 1;
ordered-by user;
description
"A user-ordered list of endpoints that the NETCONF
client will attempt to connect to in the specified
sequence.  Defining more than one enables
high-availability.";
leaf name {
type string;
description
"An arbitrary name for the endpoint.";
}
uses netconf-client-initiate-stack-grouping;
} // list endpoint
} // container endpoints

container connection-type {
description
"Indicates the NETCONF client's preference for how the
NETCONF connection is maintained.";

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choice connection-type {
mandatory true;
description
"Selects between available connection types.";
case persistent-connection {
container persistent {
presence "Indicates that a persistent connection is
to be maintained.";
description
"Maintain a persistent connection to the NETCONF
server.  If the connection goes down, immediately
start trying to reconnect to the NETCONF server,
using the reconnection strategy.

This connection type minimizes any NETCONF server
to NETCONF client data-transfer delay, albeit at
the expense of holding resources longer.";
}
}
case periodic-connection {
container periodic {
presence "Indicates that a periodic connection is
to be maintained.";
description
"Periodically connect to the NETCONF server.

This connection type increases resource
utilization, albeit with increased delay in
NETCONF server to NETCONF client interactions.

The NETCONF client should close the underlying
TCP connection upon completing planned activities.

In the case that the previous connection is still
active, establishing a new connection is NOT
RECOMMENDED.";
leaf period {
type uint16;
units "minutes";
default "60";
description
"Duration of time between periodic connections.";
}
leaf anchor-time {
type yang:date-and-time {
// constrained to minute-level granularity
pattern '\d{4}-\d{2}-\d{2}T\d{2}:\d{2}'
+ '(Z|[\+\-]\d{2}:\d{2})';

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}
description
"Designates a timestamp before or after which a
series of periodic connections are determined.
The periodic connections occur at a whole
multiple interval from the anchor time.  For
example, for an anchor time is 15 minutes past
midnight and a period interval of 24 hours, then
a periodic connection will occur 15 minutes past
midnight everyday.";
}
leaf idle-timeout {
type uint16;
units "seconds";
default 120; // two minutes
description
"Specifies the maximum number of seconds that
a NETCONF session may remain idle. A NETCONF
session will be dropped if it is idle for an
interval longer then this number of seconds.
If set to zero, then the NETCONF client will
never drop a session because it is idle.";
}
}
}
}
}
container reconnect-strategy {
description
"The reconnection strategy directs how a NETCONF client
reconnects to a NETCONF server, after discovering its
connection to the server has dropped, even if due to a
reboot.  The NETCONF client starts with the specified
endpoint and tries to connect to it max-attempts times
before trying the next endpoint in the list (round
robin).";
leaf start-with {
type enumeration {
enum first-listed {
description
the first endpoint listed.";
}
enum last-connected {
description
the endpoint last connected to.  If no previous
connection has ever been established, then the

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first endpoint configured is used.   NETCONF
clients SHOULD be able to remember the last
endpoint connected to across reboots.";
}
enum random-selection {
description
a random endpoint.";
}
}
default "first-listed";
description
"Specifies which of the NETCONF server's endpoints
to connect to the NETCONF server.";
}
leaf max-attempts {
type uint8 {
range "1..max";
}
default "3";
description
"Specifies the number times the NETCONF client tries
to connect to a specific endpoint before moving on
to the next endpoint in the list (round robin).";
}
}
} // netconf-server
} // initiate

container listen {
if-feature "ssh-listen or tls-listen";
presence "Enables client to accept call-home connections";
description
"Configures client accepting call-home TCP connections.";
leaf idle-timeout {
type uint16;
units "seconds";
default "3600"; // one hour
description
"Specifies the maximum number of seconds that a NETCONF
session may remain idle. A NETCONF session will be
dropped if it is idle for an interval longer than this
number of seconds.  If set to zero, then the server
will never drop a session because it is idle.  Sessions
that have a notification subscription active are never
dropped.";
}

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list endpoint {
key "name";
min-elements 1;
description
"List of endpoints to listen for NETCONF connections.";
leaf name {
type string;
description
"An arbitrary name for the NETCONF listen endpoint.";
}
uses netconf-client-listen-stack-grouping;
} // endpoint
} // listen
} // netconf-client-app-grouping

// Protocol accessible node, for servers that implement this
// module.

container netconf-client {
uses netconf-client-app-grouping;
description
"Top-level container for NETCONF client configuration.";
}
}

<CODE ENDS>

4.  The NETCONF Server Model

The NETCONF server model presented in this section supports both
listening for connections as well as initiating call-home
connections, using either the SSH and TLS transport protocols.

YANG feature statements are used to enable implementations to
advertise which potentially uncommon parts of the model the NETCONF
server supports.

4.1.  Tree Diagram

The following tree diagram [RFC8340] provides an overview of the data
model for the "ietf-netconf-server" module.

This tree diagram only shows the nodes defined in this module; it
does show the nodes defined by "grouping" statements used by this
module.

Please see Appendix A.2 for a tree diagram that illustrates what the
module looks like with all the "grouping" statements expanded.

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module: ietf-netconf-server
+--rw netconf-server
+---u netconf-server-app-grouping

grouping netconf-server-grouping
+-- client-identity-mappings
{tls-listen or tls-call-home or sshcmn:ssh-x509-certs}?
+---u x509c2n:cert-to-name
grouping netconf-server-listen-stack-grouping
+-- (transport)
+--:(ssh) {ssh-listen}?
|  +-- ssh
|     +-- tcp-server-parameters
|     |  +---u tcps:tcp-server-grouping
|     +-- ssh-server-parameters
|     |  +---u sshs:ssh-server-grouping
|     +-- netconf-server-parameters
|        +---u ncs:netconf-server-grouping
+--:(tls) {tls-listen}?
+-- tls
+-- tcp-server-parameters
|  +---u tcps:tcp-server-grouping
+-- tls-server-parameters
|  +---u tlss:tls-server-grouping
+-- netconf-server-parameters
+---u ncs:netconf-server-grouping
grouping netconf-server-callhome-stack-grouping
+-- (transport)
+--:(ssh) {ssh-call-home}?
|  +-- ssh
|     +-- tcp-client-parameters
|     |  +---u tcpc:tcp-client-grouping
|     +-- ssh-server-parameters
|     |  +---u sshs:ssh-server-grouping
|     +-- netconf-server-parameters
|        +---u ncs:netconf-server-grouping
+--:(tls) {tls-call-home}?
+-- tls
+-- tcp-client-parameters
|  +---u tcpc:tcp-client-grouping
+-- tls-server-parameters
|  +---u tlss:tls-server-grouping
+-- netconf-server-parameters
+---u ncs:netconf-server-grouping
grouping netconf-server-app-grouping
+-- listen! {ssh-listen or tls-listen}?
|  +-- idle-timeout?   uint16
|  +-- endpoint* [name]

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|     +-- name?                                   string
|     +---u netconf-server-listen-stack-grouping
+-- call-home! {ssh-call-home or tls-call-home}?
+-- netconf-client* [name]
+-- name?                 string
+-- endpoints
|  +-- endpoint* [name]
|     +-- name?                                     string
|     +---u netconf-server-callhome-stack-grouping
+-- connection-type
|  +-- (connection-type)
|     +--:(persistent-connection)
|     |  +-- persistent!
|     +--:(periodic-connection)
|        +-- periodic!
|           +-- period?         uint16
|           +-- anchor-time?    yang:date-and-time
|           +-- idle-timeout?   uint16
+-- reconnect-strategy
+-- start-with?     enumeration
+-- max-attempts?   uint8

4.2.  Example Usage

The following example illustrates configuring a NETCONF server to
listen for NETCONF client connections using both the SSH and TLS
transport protocols, as well as configuring call-home to two NETCONF
clients, one using SSH and the other using TLS.

This example is consistent with the examples presented in Section 2
of [I-D.ietf-netconf-trust-anchors] and Section 3.2 of
[I-D.ietf-netconf-keystore].

========== NOTE: '\' line wrapping per BCP XXX (RFC XXXX) ===========

<netconf-server
xmlns="urn:ietf:params:xml:ns:yang:ietf-netconf-server"
xmlns:ct="urn:ietf:params:xml:ns:yang:ietf-crypto-types"
xmlns:x509c2n="urn:ietf:params:xml:ns:yang:ietf-x509-cert-to-name">

<!-- endpoints to listen for NETCONF connections on -->
<listen>
<endpoint> <!-- listening for SSH connections -->
<name>netconf/ssh</name>
<ssh>
<tcp-server-parameters>
</tcp-server-parameters>

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<ssh-server-parameters>
<server-identity>
<host-key>
<name>deployment-specific-certificate</name>
<public-key>
<local-definition>
<algorithm>rsa2048</algorithm>
<public-key-format>ct:ssh-public-key-format</publi\
c-key-format>
<public-key>base64encodedvalue==</public-key>
<private-key-format>ct:rsa-private-key-format</pri\
vate-key-format>
<private-key>base64encodedvalue==</private-key>
</local-definition>
</public-key>
</host-key>
</server-identity>
<client-authentication>
<supported-authentication-methods>
<publickey/>
</supported-authentication-methods>
</client-authentication>
</ssh-server-parameters>
<netconf-server-parameters>
<!-- nothing to configure -->
</netconf-server-parameters>
</ssh>
</endpoint>
<endpoint> <!-- listening for TLS sessions -->
<name>netconf/tls</name>
<tls>
<tcp-server-parameters>
</tcp-server-parameters>
<tls-server-parameters>
<server-identity>
<certificate>
<local-definition>
<algorithm>rsa2048</algorithm>
<public-key-format>ct:subject-public-key-info-format\
</public-key-format>
<public-key>base64encodedvalue==</public-key>
<private-key-format>ct:rsa-private-key-format</priva\
te-key-format>
<private-key>base64encodedvalue==</private-key>
<cert>base64encodedvalue==</cert>
</local-definition>
</certificate>

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</server-identity>
<client-authentication>
<ca-certs>
<truststore-reference>trusted-client-ca-certs</trustst\
ore-reference>
</ca-certs>
<client-certs>
<truststore-reference>trusted-client-ee-certs</trustst\
ore-reference>
</client-certs>
</client-authentication>
</tls-server-parameters>
<netconf-server-parameters>
<client-identity-mappings>
<cert-to-name>
<id>1</id>
<fingerprint>11:0A:05:11:00</fingerprint>
<map-type>x509c2n:specified</map-type>
<name>scooby-doo</name>
</cert-to-name>
<cert-to-name>
<id>2</id>
<map-type>x509c2n:san-any</map-type>
</cert-to-name>
</client-identity-mappings>
</netconf-server-parameters>
</tls>
</endpoint>
</listen>

<!-- calling home to SSH and TLS based NETCONF clients -->
<call-home>
<netconf-client> <!-- SSH-based client -->
<name>config-mgr</name>
<endpoints>
<endpoint>
<name>east-data-center</name>
<ssh>
<tcp-client-parameters>
dress>
</tcp-client-parameters>
<ssh-server-parameters>
<server-identity>
<host-key>
<name>deployment-specific-certificate</name>
<public-key>
<local-definition>

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<algorithm>rsa2048</algorithm>
<public-key-format>ct:ssh-public-key-format</p\
ublic-key-format>
<public-key>base64encodedvalue==</public-key>
<private-key-format>ct:rsa-private-key-format<\
/private-key-format>
<private-key>base64encodedvalue==</private-key>
</local-definition>
</public-key>
</host-key>
</server-identity>
<client-authentication>
<supported-authentication-methods>
<publickey/>
</supported-authentication-methods>
</client-authentication>
</ssh-server-parameters>
<netconf-server-parameters>
<!-- nothing to configure -->
</netconf-server-parameters>
</ssh>
</endpoint>
<endpoint>
<name>west-data-center</name>
<ssh>
<tcp-client-parameters>
dress>
</tcp-client-parameters>
<ssh-server-parameters>
<server-identity>
<host-key>
<name>deployment-specific-certificate</name>
<public-key>
<local-definition>
<algorithm>rsa2048</algorithm>
<public-key-format>ct:ssh-public-key-format</p\
ublic-key-format>
<public-key>base64encodedvalue==</public-key>
<private-key-format>ct:rsa-private-key-format<\
/private-key-format>
<private-key>base64encodedvalue==</private-key>
</local-definition>
</public-key>
</host-key>
</server-identity>
<client-authentication>
<supported-authentication-methods>

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<publickey/>
</supported-authentication-methods>
</client-authentication>
</ssh-server-parameters>
<netconf-server-parameters>
<!-- nothing to configure -->
</netconf-server-parameters>
</ssh>
</endpoint>
</endpoints>
<connection-type>
<periodic>
<idle-timeout>300</idle-timeout>
<period>60</period>
</periodic>
</connection-type>
<reconnect-strategy>
<start-with>last-connected</start-with>
<max-attempts>3</max-attempts>
</reconnect-strategy>
</netconf-client>
<netconf-client> <!-- TLS-based client -->
<name>data-collector</name>
<endpoints>
<endpoint>
<name>east-data-center</name>
<tls>
<tcp-client-parameters>
ress>
<keepalives>
<idle-time>15</idle-time>
<max-probes>3</max-probes>
<probe-interval>30</probe-interval>
</keepalives>
</tcp-client-parameters>
<tls-server-parameters>
<server-identity>
<certificate>
<local-definition>
<algorithm>rsa2048</algorithm>
<public-key-format>ct:subject-public-key-info-fo\
rmat</public-key-format>
<public-key>base64encodedvalue==</public-key>
<private-key-format>ct:rsa-private-key-format</p\
rivate-key-format>
<private-key>base64encodedvalue==</private-key>
<cert>base64encodedvalue==</cert>

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</local-definition>
</certificate>
</server-identity>
<client-authentication>
<ca-certs>
<truststore-reference>trusted-client-ca-certs</tru\
ststore-reference>
</ca-certs>
<client-certs>
<truststore-reference>trusted-client-ee-certs</tru\
ststore-reference>
</client-certs>
</client-authentication>
<keepalives>
<max-wait>30</max-wait>
<max-attempts>3</max-attempts>
</keepalives>
</tls-server-parameters>
<netconf-server-parameters>
<client-identity-mappings>
<cert-to-name>
<id>1</id>
<fingerprint>11:0A:05:11:00</fingerprint>
<map-type>x509c2n:specified</map-type>
<name>scooby-doo</name>
</cert-to-name>
<cert-to-name>
<id>2</id>
<map-type>x509c2n:san-any</map-type>
</cert-to-name>
</client-identity-mappings>
</netconf-server-parameters>
</tls>
</endpoint>
<endpoint>
<name>west-data-center</name>
<tls>
<tcp-client-parameters>
ress>
<keepalives>
<idle-time>15</idle-time>
<max-probes>3</max-probes>
<probe-interval>30</probe-interval>
</keepalives>
</tcp-client-parameters>
<tls-server-parameters>
<server-identity>

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<certificate>
<local-definition>
<algorithm>rsa2048</algorithm>
<public-key-format>ct:subject-public-key-info-fo\
rmat</public-key-format>
<public-key>base64encodedvalue==</public-key>
<private-key-format>ct:rsa-private-key-format</p\
rivate-key-format>
<private-key>base64encodedvalue==</private-key>
<cert>base64encodedvalue==</cert>
</local-definition>
</certificate>
</server-identity>
<client-authentication>
<ca-certs>
<truststore-reference>trusted-client-ca-certs</tru\
ststore-reference>
</ca-certs>
<client-certs>
<truststore-reference>trusted-client-ee-certs</tru\
ststore-reference>
</client-certs>
</client-authentication>
<keepalives>
<max-wait>30</max-wait>
<max-attempts>3</max-attempts>
</keepalives>
</tls-server-parameters>
<netconf-server-parameters>
<client-identity-mappings>
<cert-to-name>
<id>1</id>
<fingerprint>11:0A:05:11:00</fingerprint>
<map-type>x509c2n:specified</map-type>
<name>scooby-doo</name>
</cert-to-name>
<cert-to-name>
<id>2</id>
<map-type>x509c2n:san-any</map-type>
</cert-to-name>
</client-identity-mappings>
</netconf-server-parameters>
</tls>
</endpoint>
</endpoints>
<connection-type>
<persistent/>
</connection-type>

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<reconnect-strategy>
<start-with>first-listed</start-with>
<max-attempts>3</max-attempts>
</reconnect-strategy>
</netconf-client>
</call-home>
</netconf-server>

4.3.  YANG Module

This YANG module has normative references to [RFC6242], [RFC6991],
[RFC7407], [RFC7589], [RFC8071],
[I-D.kwatsen-netconf-tcp-client-server],
[I-D.ietf-netconf-ssh-client-server], and
[I-D.ietf-netconf-tls-client-server].

<CODE BEGINS> file "ietf-netconf-server@2020-03-08.yang"

module ietf-netconf-server {
yang-version 1.1;
namespace "urn:ietf:params:xml:ns:yang:ietf-netconf-server";
prefix ncs;

import ietf-yang-types {
prefix yang;
reference
"RFC 6991: Common YANG Data Types";
}

import ietf-x509-cert-to-name {
prefix x509c2n;
reference
"RFC 7407: A YANG Data Model for SNMP Configuration";
}

import ietf-tcp-client {
prefix tcpc;
reference
"RFC BBBB: YANG Groupings for TCP Clients and TCP Servers";
}

import ietf-tcp-server {
prefix tcps;
reference
"RFC BBBB: YANG Groupings for TCP Clients and TCP Servers";
}

import ietf-ssh-common {

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prefix sshcmn;
revision-date 2020-03-08; // stable grouping definitions
reference
"RFC CCCC: YANG Groupings for SSH Clients and SSH Servers";
}

import ietf-ssh-server {
prefix sshs;
revision-date 2020-03-08; // stable grouping definitions
reference
"RFC CCCC: YANG Groupings for SSH Clients and SSH Servers";
}

import ietf-tls-server {
prefix tlss;
revision-date 2020-03-08; // stable grouping definitions
reference
"RFC DDDD: YANG Groupings for TLS Clients and TLS Servers";
}

organization
"IETF NETCONF (Network Configuration) Working Group";

contact
"WG Web:   <http://datatracker.ietf.org/wg/netconf/>
WG List:  <mailto:netconf@ietf.org>
Author:   Kent Watsen <mailto:kent+ietf@watsen.net>
Author:   Gary Wu <mailto:garywu@cisco.com>
Author:   Juergen Schoenwaelder
<mailto:j.schoenwaelder@jacobs-university.de>";

description
"This module contains a collection of YANG definitions
for configuring NETCONF servers.

Copyright (c) 2019 IETF Trust and the persons identified

Redistribution and use in source and binary forms, with
or without modification, is permitted pursuant to, and
subject to the license terms contained in, the Simplified
BSD License set forth in Section 4.c of the IETF Trust's
Legal Provisions Relating to IETF Documents

This version of this YANG module is part of RFC XXXX
(https://www.rfc-editor.org/info/rfcXXXX); see the RFC
itself for full legal notices.;

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The key words 'MUST', 'MUST NOT', 'REQUIRED', 'SHALL',
'SHALL NOT', 'SHOULD', 'SHOULD NOT', 'RECOMMENDED',
'NOT RECOMMENDED', 'MAY', and 'OPTIONAL' in this document
are to be interpreted as described in BCP 14 (RFC 2119)
(RFC 8174) when, and only when, they appear in all
capitals, as shown here.";

revision 2020-03-08 {
description
"Initial version";
reference
"RFC XXXX: NETCONF Client and Server Models";
}

// Features

feature ssh-listen {
description
"The 'ssh-listen' feature indicates that the NETCONF server
supports opening a port to accept NETCONF over SSH
client connections.";
reference
"RFC 6242:
Using the NETCONF Protocol over Secure Shell (SSH)";
}

feature tls-listen {
description
"The 'tls-listen' feature indicates that the NETCONF server
supports opening a port to accept NETCONF over TLS
client connections.";
reference
"RFC 7589: Using the NETCONF Protocol over Transport
Layer Security (TLS) with Mutual X.509
Authentication";
}

feature ssh-call-home {
description
"The 'ssh-call-home' feature indicates that the NETCONF
server supports initiating a NETCONF over SSH call
home connection to NETCONF clients.";
reference
"RFC 8071: NETCONF Call Home and RESTCONF Call Home";
}

feature tls-call-home {
description

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"The 'tls-call-home' feature indicates that the NETCONF
server supports initiating a NETCONF over TLS call
home connection to NETCONF clients.";
reference
"RFC 8071: NETCONF Call Home and RESTCONF Call Home";
}

// Groupings

grouping netconf-server-grouping {
description
"A reusable grouping for configuring a NETCONF server
without any consideration for how underlying transport
sessions are established.

Note that this grouping uses a fairly typical descendent
node name such that a stack of 'uses' statements will
have name conflicts.  It is intended that the consuming
data model will resolve the issue by wrapping the 'uses'
statement in a container called, e.g.,
'netconf-server-parameters'.  This model purposely does
not do this itself so as to provide maximum flexibility
to consuming models.";

container client-identity-mappings {
if-feature
"tls-listen or tls-call-home or sshcmn:ssh-x509-certs";
description
"Specifies mappings through which NETCONF client X.509
certificates are used to determine a NETCONF username.
If no matching and valid cert-to-name list entry can be
found, then the NETCONF server MUST close the connection,
and MUST NOT accept NETCONF messages over it.";
reference
"RFC 7407: A YANG Data Model for SNMP Configuration.";
uses x509c2n:cert-to-name {
refine "cert-to-name/fingerprint" {
mandatory false;
description
"A 'fingerprint' value does not need to be specified
when the 'cert-to-name' mapping is independent of
fingerprint matching.  A 'cert-to-name' having no
fingerprint value will match any client certificate
and therefore should only be present at the end of
the user-ordered 'cert-to-name' list.";
}
}
}

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}

grouping netconf-server-listen-stack-grouping {
description
"A reusable grouping for configuring a NETCONF server
'listen' protocol stack for a single connection.";
choice transport {
mandatory true;
description
"Selects between available transports.";
case ssh {
if-feature "ssh-listen";
container ssh {
description
"SSH-specific listening configuration for inbound
connections.";
container tcp-server-parameters {
description
"A wrapper around the TCP client parameters
to avoid name collisions.";
uses tcps:tcp-server-grouping {
refine "local-port" {
default "830";
description
"The NETCONF server will listen on the
IANA-assigned well-known port value
for 'netconf-ssh' (830) if no value
is specified.";
}
}
}
container ssh-server-parameters {
description
"A wrapper around the SSH server parameters
to avoid name collisions.";
uses sshs:ssh-server-grouping;
}
container netconf-server-parameters {
description
"A wrapper around the NETCONF server parameters
to avoid name collisions.";
uses ncs:netconf-server-grouping;
}
}
}
case tls {
if-feature "tls-listen";
container tls {

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description
"TLS-specific listening configuration for inbound
connections.";
container tcp-server-parameters {
description
"A wrapper around the TCP client parameters
to avoid name collisions.";
uses tcps:tcp-server-grouping {
refine "local-port" {
default "6513";
description
"The NETCONF server will listen on the
IANA-assigned well-known port value
for 'netconf-tls' (6513) if no value
is specified.";
}
}
}
container tls-server-parameters {
description
"A wrapper around the TLS server parameters to
avoid name collisions.";
uses tlss:tls-server-grouping {
refine "client-authentication" {
must 'ca-certs or client-certs';
description
"NETCONF/TLS servers MUST validate client
certificates.";
}
}
}
container netconf-server-parameters {
description
"A wrapper around the NETCONF server parameters
to avoid name collisions.";
uses ncs:netconf-server-grouping;
}
}
}
}
}

grouping netconf-server-callhome-stack-grouping {
description
"A reusable grouping for configuring a NETCONF server
'call-home' protocol stack, for a single connection.";
choice transport {
mandatory true;

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description
"Selects between available transports.";
case ssh {
if-feature "ssh-call-home";
container ssh {
description
"Specifies SSH-specific call-home transport
configuration.";
container tcp-client-parameters {
description
"A wrapper around the TCP client parameters
to avoid name collisions.";
uses tcpc:tcp-client-grouping {
refine "remote-port" {
default "4334";
description
"The NETCONF server will attempt to connect
to the IANA-assigned well-known port for
'netconf-ch-tls' (4334) if no value is
specified.";
}
}
}
container ssh-server-parameters {
description
"A wrapper around the SSH server parameters
to avoid name collisions.";
uses sshs:ssh-server-grouping;
}
container netconf-server-parameters {
description
"A wrapper around the NETCONF server parameters
to avoid name collisions.";
uses ncs:netconf-server-grouping;
}
}
}
case tls {
if-feature "tls-call-home";
container tls {
description
"Specifies TLS-specific call-home transport
configuration.";
container tcp-client-parameters {
description
"A wrapper around the TCP client parameters
to avoid name collisions.";
uses tcpc:tcp-client-grouping {

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refine "remote-port" {
default "4335";
description
"The NETCONF server will attempt to connect
to the IANA-assigned well-known port for
'netconf-ch-tls' (4335) if no value is
specified.";
}
}
}
container tls-server-parameters {
description
"A wrapper around the TLS server parameters to
avoid name collisions.";
uses tlss:tls-server-grouping; /* {
FIXME: commented out since auth could also be external.
^-- need a better 'must' expression?
refine "client-authentication" {
must 'ca-certs or client-certs';
description
"NETCONF/TLS servers MUST validate client
certificates.";
}
}*/
}
container netconf-server-parameters {
description
"A wrapper around the NETCONF server parameters
to avoid name collisions.";
uses ncs:netconf-server-grouping;
}
}
}
}
}

grouping netconf-server-app-grouping {
description
"A reusable grouping for configuring a NETCONF server
application that supports both 'listen' and 'call-home'
protocol stacks for a multiplicity of connections.";
container listen {
if-feature "ssh-listen or tls-listen";
presence
"Enables server to listen for NETCONF client connections.";
description
"Configures listen behavior";
leaf idle-timeout {

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type uint16;
units "seconds";
default 3600; // one hour
description
"Specifies the maximum number of seconds that a NETCONF
session may remain idle. A NETCONF session will be
dropped if it is idle for an interval longer than this
number of seconds.  If set to zero, then the server
will never drop a session because it is idle.  Sessions
that have a notification subscription active are never
dropped.";
}
list endpoint {
key "name";
min-elements 1;
description
"List of endpoints to listen for NETCONF connections.";
leaf name {
type string;
description
"An arbitrary name for the NETCONF listen endpoint.";
}
uses netconf-server-listen-stack-grouping;
}
}
container call-home {
if-feature "ssh-call-home or tls-call-home";
presence
"Enables the NETCONF server to initiate the underlying
transport connection to NETCONF clients.";
description "Configures call home behavior.";
list netconf-client {
key "name";
min-elements 1;
description
"List of NETCONF clients the NETCONF server is to
maintain simultaneous call-home connections with.";
leaf name {
type string;
description
"An arbitrary name for the remote NETCONF client.";
}
container endpoints {
description
"Container for the list of endpoints.";
list endpoint {
key "name";
min-elements 1;

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ordered-by user;
description
"A non-empty user-ordered list of endpoints for this
NETCONF server to try to connect to in sequence.
Defining more than one enables high-availability.";
leaf name {
type string;
description
"An arbitrary name for this endpoint.";
}
uses netconf-server-callhome-stack-grouping;
}
}
container connection-type {
description
"Indicates the NETCONF server's preference for how the
NETCONF connection is maintained.";
choice connection-type {
mandatory true;
description
"Selects between available connection types.";
case persistent-connection {
container persistent {
presence "Indicates that a persistent connection is
to be maintained.";
description
"Maintain a persistent connection to the NETCONF
client. If the connection goes down, immediately
start trying to reconnect to the NETCONF client,
using the reconnection strategy.

This connection type minimizes any NETCONF client
to NETCONF server data-transfer delay, albeit at
the expense of holding resources longer.";
}
}
case periodic-connection {
container periodic {
presence "Indicates that a periodic connection is
to be maintained.";
description
"Periodically connect to the NETCONF client.

This connection type increases resource
utilization, albeit with increased delay in
NETCONF client to NETCONF client interactions.

The NETCONF client SHOULD gracefully close the

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connection using <close-session> upon completing
planned activities.  If the NETCONF session is
not closed gracefully, the NETCONF server MUST
immediately attempt to reestablish the connection.

In the case that the previous connection is still
active (i.e., the NETCONF client has not closed
it yet), establishing a new connection is NOT
RECOMMENDED.";
leaf period {
type uint16;
units "minutes";
default "60";
description
"Duration of time between periodic connections.";
}
leaf anchor-time {
type yang:date-and-time {
// constrained to minute-level granularity
pattern '\d{4}-\d{2}-\d{2}T\d{2}:\d{2}'
+ '(Z|[\+\-]\d{2}:\d{2})';
}
description
"Designates a timestamp before or after which a
series of periodic connections are determined.
The periodic connections occur at a whole
multiple interval from the anchor time.  For
example, for an anchor time is 15 minutes past
midnight and a period interval of 24 hours, then
a periodic connection will occur 15 minutes past
midnight everyday.";
}
leaf idle-timeout {
type uint16;
units "seconds";
default 120; // two minutes
description
"Specifies the maximum number of seconds that
a NETCONF session may remain idle. A NETCONF
session will be dropped if it is idle for an
interval longer than this number of seconds.
If set to zero, then the server will never
drop a session because it is idle.";
}
}
} // case periodic-connection
} // choice connection-type
} // container connection-type

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container reconnect-strategy {
description
"The reconnection strategy directs how a NETCONF server
reconnects to a NETCONF client, after discovering its
connection to the client has dropped, even if due to a
reboot.  The NETCONF server starts with the specified
endpoint and tries to connect to it max-attempts times
before trying the next endpoint in the list (round
robin).";
leaf start-with {
type enumeration {
enum first-listed {
description
the first endpoint listed.";
}
enum last-connected {
description
the endpoint last connected to.  If no previous
connection has ever been established, then the
first endpoint configured is used.   NETCONF
servers SHOULD be able to remember the last
endpoint connected to across reboots.";
}
enum random-selection {
description
a random endpoint.";
}
}
default "first-listed";
description
"Specifies which of the NETCONF client's endpoints
to connect to the NETCONF client.";
}
leaf max-attempts {
type uint8 {
range "1..max";
}
default "3";
description
"Specifies the number times the NETCONF server tries
to connect to a specific endpoint before moving on
to the next endpoint in the list (round robin).";
}
} // container reconnect-strategy

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} // list netconf-client
} // container call-home
} // grouping netconf-server-app-grouping

// Protocol accessible node, for servers that implement this
// module.

container netconf-server {
uses netconf-server-app-grouping;
description
"Top-level container for NETCONF server configuration.";
}
}

<CODE ENDS>

5.  Security Considerations

The YANG module defined in this document uses groupings defined in
[I-D.kwatsen-netconf-tcp-client-server],
[I-D.ietf-netconf-ssh-client-server], and
Considerations section in those documents for concerns related those
groupings.

The YANG modules defined in this document are designed to be accessed
via YANG based management protocols, such as NETCONF [RFC6241] and
RESTCONF [RFC8040].  Both of these protocols have mandatory-to-
implement secure transport layers (e.g., SSH, TLS) with mutual
authentication.

The NETCONF access control model (NACM) [RFC8341] provides the means
to restrict access for particular users to a pre-configured subset of
all available protocol operations and content.

There are a number of data nodes defined in the YANG modules that are
writable/creatable/deletable (i.e., config true, which is the
default).  Some of these data nodes may be considered sensitive or
vulnerable in some network environments.  Write operations (e.g.,
edit-config) to these data nodes without proper protection can have a
negative effect on network operations.  These are the subtrees and
data nodes and their sensitivity/vulnerability:

None of the subtrees or data nodes in the modules defined in this
document need to be protected from write operations.

Some of the readable data nodes in the YANG modules may be considered
sensitive or vulnerable in some network environments.  It is thus

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important to control read access (e.g., via get, get-config, or
notification) to these data nodes.  These are the subtrees and data
nodes and their sensitivity/vulnerability:

None of the subtrees or data nodes in the modules defined in this
document need to be protected from read operations.

Some of the RPC operations in the YANG modules may be considered
sensitive or vulnerable in some network environments.  It is thus
operations and their sensitivity/vulnerability:

The modules defined in this document do not define any 'RPC' or
'action' statements.

6.  IANA Considerations

6.1.  The IETF XML Registry

This document registers two URIs in the "ns" subregistry of the IETF
XML Registry [RFC3688].  Following the format in [RFC3688], the
following registrations are requested:

URI: urn:ietf:params:xml:ns:yang:ietf-netconf-client
Registrant Contact: The NETCONF WG of the IETF.
XML: N/A, the requested URI is an XML namespace.

URI: urn:ietf:params:xml:ns:yang:ietf-netconf-server
Registrant Contact: The NETCONF WG of the IETF.
XML: N/A, the requested URI is an XML namespace.

6.2.  The YANG Module Names Registry

This document registers two YANG modules in the YANG Module Names
registry [RFC6020].  Following the format in [RFC6020], the the
following registrations are requested:

name:         ietf-netconf-client
namespace:    urn:ietf:params:xml:ns:yang:ietf-netconf-client
prefix:       ncc
reference:    RFC XXXX

name:         ietf-netconf-server
namespace:    urn:ietf:params:xml:ns:yang:ietf-netconf-server
prefix:       ncs
reference:    RFC XXXX

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7.  References

7.1.  Normative References

[I-D.ietf-netconf-keystore]
Watsen, K., "A YANG Data Model for a Keystore", draft-
ietf-netconf-keystore-15 (work in progress), November
2019.

[I-D.ietf-netconf-ssh-client-server]
Watsen, K., Wu, G., and L. Xia, "YANG Groupings for SSH
Clients and SSH Servers", draft-ietf-netconf-ssh-client-
server-17 (work in progress), November 2019.

[I-D.ietf-netconf-tls-client-server]
Watsen, K., Wu, G., and L. Xia, "YANG Groupings for TLS
Clients and TLS Servers", draft-ietf-netconf-tls-client-
server-17 (work in progress), November 2019.

[I-D.kwatsen-netconf-tcp-client-server]
Watsen, K. and M. Scharf, "YANG Groupings for TCP Clients
and TCP Servers", draft-kwatsen-netconf-tcp-client-
server-02 (work in progress), April 2019.

[RFC2119]  Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119,
DOI 10.17487/RFC2119, March 1997,
<https://www.rfc-editor.org/info/rfc2119>.

[RFC6020]  Bjorklund, M., Ed., "YANG - A Data Modeling Language for
the Network Configuration Protocol (NETCONF)", RFC 6020,
DOI 10.17487/RFC6020, October 2010,
<https://www.rfc-editor.org/info/rfc6020>.

[RFC6241]  Enns, R., Ed., Bjorklund, M., Ed., Schoenwaelder, J., Ed.,
and A. Bierman, Ed., "Network Configuration Protocol
(NETCONF)", RFC 6241, DOI 10.17487/RFC6241, June 2011,
<https://www.rfc-editor.org/info/rfc6241>.

[RFC6242]  Wasserman, M., "Using the NETCONF Protocol over Secure
Shell (SSH)", RFC 6242, DOI 10.17487/RFC6242, June 2011,
<https://www.rfc-editor.org/info/rfc6242>.

[RFC6991]  Schoenwaelder, J., Ed., "Common YANG Data Types",
RFC 6991, DOI 10.17487/RFC6991, July 2013,
<https://www.rfc-editor.org/info/rfc6991>.

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[RFC7407]  Bjorklund, M. and J. Schoenwaelder, "A YANG Data Model for
SNMP Configuration", RFC 7407, DOI 10.17487/RFC7407,
December 2014, <https://www.rfc-editor.org/info/rfc7407>.

[RFC7589]  Badra, M., Luchuk, A., and J. Schoenwaelder, "Using the
NETCONF Protocol over Transport Layer Security (TLS) with
Mutual X.509 Authentication", RFC 7589,
DOI 10.17487/RFC7589, June 2015,
<https://www.rfc-editor.org/info/rfc7589>.

[RFC7950]  Bjorklund, M., Ed., "The YANG 1.1 Data Modeling Language",
RFC 7950, DOI 10.17487/RFC7950, August 2016,
<https://www.rfc-editor.org/info/rfc7950>.

[RFC8174]  Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC
2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174,
May 2017, <https://www.rfc-editor.org/info/rfc8174>.

7.2.  Informative References

[I-D.ietf-netconf-trust-anchors]
Watsen, K., "A YANG Data Model for a Truststore", draft-
ietf-netconf-trust-anchors-08 (work in progress), November
2019.

[RFC3688]  Mealling, M., "The IETF XML Registry", BCP 81, RFC 3688,
DOI 10.17487/RFC3688, January 2004,
<https://www.rfc-editor.org/info/rfc3688>.

[RFC8040]  Bierman, A., Bjorklund, M., and K. Watsen, "RESTCONF
Protocol", RFC 8040, DOI 10.17487/RFC8040, January 2017,
<https://www.rfc-editor.org/info/rfc8040>.

[RFC8071]  Watsen, K., "NETCONF Call Home and RESTCONF Call Home",
RFC 8071, DOI 10.17487/RFC8071, February 2017,
<https://www.rfc-editor.org/info/rfc8071>.

[RFC8340]  Bjorklund, M. and L. Berger, Ed., "YANG Tree Diagrams",
BCP 215, RFC 8340, DOI 10.17487/RFC8340, March 2018,
<https://www.rfc-editor.org/info/rfc8340>.

[RFC8341]  Bierman, A. and M. Bjorklund, "Network Configuration
Access Control Model", STD 91, RFC 8341,
DOI 10.17487/RFC8341, March 2018,
<https://www.rfc-editor.org/info/rfc8341>.

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Appendix A.  Expanded Tree Diagrams

A.1.  Expanded Tree Diagram for 'ietf-netconf-client'

The following tree diagram [RFC8340] provides an overview of the data
model for the "ietf-netconf-client" module.

This tree diagram shows all the nodes defined in this module,
including those defined by "grouping" statements used by this module.

Please see Section 3.1 for a tree diagram that illustrates what the
module looks like without all the "grouping" statements expanded.

========== NOTE: '\\' line wrapping per BCP XXX (RFC XXXX) ==========

module: ietf-netconf-client
+--rw netconf-client
+--rw initiate! {ssh-initiate or tls-initiate}?
|  +--rw netconf-server* [name]
|     +--rw name                  string
|     +--rw endpoints
|     |  +--rw endpoint* [name]
|     |     +--rw name         string
|     |     +--rw (transport)
|     |        +--:(ssh) {ssh-initiate}?
|     |        |  +--rw ssh
|     |        |     +--rw tcp-client-parameters
|     |        |     |  +--rw remote-address    inet:host
|     |        |     |  +--rw remote-port?      inet:port-number
|     |        |     |  |       {local-binding-supported}?
|     |        |     |  +--rw local-port?       inet:port-number
|     |        |     |  |       {local-binding-supported}?
|     |        |     |  +--rw keepalives!
|     |        |     |          {keepalives-supported}?
|     |        |     |     +--rw idle-time         uint16
|     |        |     |     +--rw max-probes        uint16
|     |        |     |     +--rw probe-interval    uint16
|     |        |     +--rw ssh-client-parameters
|     |        |     |  +--rw client-identity
|     |        |     |  |  +--rw username?            string
|     |        |     |  |  +--rw (auth-type)
|     |        |     |  |     +--:(public-key)
|     |        |     |  |     |  +--rw public-key
|     |        |     |  |     |     +--rw (local-or-keystore)
|     |        |     |  |     |        +--:(local)
|     |        |     |  |     |        |        {local-definiti\
\ons-supported}?

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|     |        |     |  |     |        |  +--rw local-definition
|     |        |     |  |     |        |     +--rw algorithm
|     |        |     |  |     |        |     |       iasa:asymm\
\etric-algorithm-type
|     |        |     |  |     |        |     +--rw public-key-f\
\ormat
|     |        |     |  |     |        |     |       identityref
|     |        |     |  |     |        |     +--rw public-key
|     |        |     |  |     |        |     |       binary
|     |        |     |  |     |        |     +--rw private-key-\
\format?
|     |        |     |  |     |        |     |       identityref
|     |        |     |  |     |        |     +--rw (private-key\
\-type)
|     |        |     |  |     |        |        +--:(private-ke\
\y)
|     |        |     |  |     |        |        |  +--rw privat\
\e-key?
|     |        |     |  |     |        |        |          bina\
\ry
|     |        |     |  |     |        |        +--:(hidden-pri\
\vate-key)
|     |        |     |  |     |        |        |  +--rw hidden\
\-private-key?
|     |        |     |  |     |        |        |          empty
|     |        |     |  |     |        |        +--:(encrypted-\
\private-key)
|     |        |     |  |     |        |           +--rw encryp\
\ted-private-key
|     |        |     |  |     |        |              +--rw (ke\
\y-type)
|     |        |     |  |     |        |              |  +--:(s\
\ymmetric-key-ref)
|     |        |     |  |     |        |              |  |  +--\
\rw symmetric-key-ref?    leafref
|     |        |     |  |     |        |              |  |     \
\     {keystore-supported}?
|     |        |     |  |     |        |              |  +--:(a\
\symmetric-key-ref)
|     |        |     |  |     |        |              |     +--\
\rw asymmetric-key-ref?   leafref
|     |        |     |  |     |        |              |        \
\     {keystore-supported}?
|     |        |     |  |     |        |              +--rw val\
\ue?
|     |        |     |  |     |        |                      b\
\inary
|     |        |     |  |     |        +--:(keystore)

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|     |        |     |  |     |                 {keystore-suppo\
\rted}?
|     |        |     |  |     |           +--rw keystore-refere\
\nce?
|     |        |     |  |     |                   ks:asymmetric\
\-key-ref
|     |        |     |  |     +--:(password)
|     |        |     |  |     |  +--rw password?      string
|     |        |     |  |     |          {client-identity-passw\
\ord}?
|     |        |     |  |     +--:(hostbased)
|     |        |     |  |     |  +--rw hostbased
|     |        |     |  |     |          {client-identity-hostb\
\ased}?
|     |        |     |  |     |     +--rw (local-or-keystore)
|     |        |     |  |     |        +--:(local)
|     |        |     |  |     |        |        {local-definiti\
\ons-supported}?
|     |        |     |  |     |        |  +--rw local-definition
|     |        |     |  |     |        |     +--rw algorithm
|     |        |     |  |     |        |     |       iasa:asymm\
\etric-algorithm-type
|     |        |     |  |     |        |     +--rw public-key-f\
\ormat
|     |        |     |  |     |        |     |       identityref
|     |        |     |  |     |        |     +--rw public-key
|     |        |     |  |     |        |     |       binary
|     |        |     |  |     |        |     +--rw private-key-\
\format?
|     |        |     |  |     |        |     |       identityref
|     |        |     |  |     |        |     +--rw (private-key\
\-type)
|     |        |     |  |     |        |        +--:(private-ke\
\y)
|     |        |     |  |     |        |        |  +--rw privat\
\e-key?
|     |        |     |  |     |        |        |          bina\
\ry
|     |        |     |  |     |        |        +--:(hidden-pri\
\vate-key)
|     |        |     |  |     |        |        |  +--rw hidden\
\-private-key?
|     |        |     |  |     |        |        |          empty
|     |        |     |  |     |        |        +--:(encrypted-\
\private-key)
|     |        |     |  |     |        |           +--rw encryp\
\ted-private-key
|     |        |     |  |     |        |              +--rw (ke\

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\y-type)
|     |        |     |  |     |        |              |  +--:(s\
\ymmetric-key-ref)
|     |        |     |  |     |        |              |  |  +--\
\rw symmetric-key-ref?    leafref
|     |        |     |  |     |        |              |  |     \
\     {keystore-supported}?
|     |        |     |  |     |        |              |  +--:(a\
\symmetric-key-ref)
|     |        |     |  |     |        |              |     +--\
\rw asymmetric-key-ref?   leafref
|     |        |     |  |     |        |              |        \
\     {keystore-supported}?
|     |        |     |  |     |        |              +--rw val\
\ue?
|     |        |     |  |     |        |                      b\
\inary
|     |        |     |  |     |        +--:(keystore)
|     |        |     |  |     |                 {keystore-suppo\
\rted}?
|     |        |     |  |     |           +--rw keystore-refere\
\nce?
|     |        |     |  |     |                   ks:asymmetric\
\-key-ref
|     |        |     |  |     +--:(none)
|     |        |     |  |     |  +--rw none?          empty
|     |        |     |  |     |          {client-identity-none}?
|     |        |     |  |     +--:(certificate)
|     |        |     |  |        +--rw certificate
|     |        |     |  |                {sshcmn:ssh-x509-certs\
\}?
|     |        |     |  |           +--rw (local-or-keystore)
|     |        |     |  |              +--:(local)
|     |        |     |  |              |        {local-definiti\
\ons-supported}?
|     |        |     |  |              |  +--rw local-definition
|     |        |     |  |              |     +--rw algorithm
|     |        |     |  |              |     |       iasa:asymm\
\etric-algorithm-type
|     |        |     |  |              |     +--rw public-key-f\
\ormat
|     |        |     |  |              |     |       identityref
|     |        |     |  |              |     +--rw public-key
|     |        |     |  |              |     |       binary
|     |        |     |  |              |     +--rw private-key-\
\format?
|     |        |     |  |              |     |       identityref
|     |        |     |  |              |     +--rw (private-key\

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Internet-Draft      NETCONF Client and Server Models          March 2020

\-type)
|     |        |     |  |              |     |  +--:(private-ke\
\y)
|     |        |     |  |              |     |  |  +--rw privat\
\e-key?
|     |        |     |  |              |     |  |          bina\
\ry
|     |        |     |  |              |     |  +--:(hidden-pri\
\vate-key)
|     |        |     |  |              |     |  |  +--rw hidden\
\-private-key?
|     |        |     |  |              |     |  |          empty
|     |        |     |  |              |     |  +--:(encrypted-\
\private-key)
|     |        |     |  |              |     |     +--rw encryp\
\ted-private-key
|     |        |     |  |              |     |        +--rw (ke\
\y-type)
|     |        |     |  |              |     |        |  +--:(s\
\ymmetric-key-ref)
|     |        |     |  |              |     |        |  |  +--\
\rw symmetric-key-ref?    leafref
|     |        |     |  |              |     |        |  |     \
\     {keystore-supported}?
|     |        |     |  |              |     |        |  +--:(a\
\symmetric-key-ref)
|     |        |     |  |              |     |        |     +--\
\rw asymmetric-key-ref?   leafref
|     |        |     |  |              |     |        |        \
\     {keystore-supported}?
|     |        |     |  |              |     |        +--rw val\
\ue?
|     |        |     |  |              |     |                b\
\inary
|     |        |     |  |              |     +--rw cert?
|     |        |     |  |              |     |       end-entity\
\-cert-cms
|     |        |     |  |              |     +---n certificate-\
\expiration
|     |        |     |  |              |     |  +-- expiration-\
\date
|     |        |     |  |              |     |          yang:da\
\te-and-time
|     |        |     |  |              |     +---x generate-cer\
\tificate-signing-request
|     |        |     |  |              |        +---w input
|     |        |     |  |              |        |  +---w subject
|     |        |     |  |              |        |  |       bina\

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Internet-Draft      NETCONF Client and Server Models          March 2020

\ry
|     |        |     |  |              |        |  +---w attrib\
\utes?
|     |        |     |  |              |        |          bina\
\ry
|     |        |     |  |              |        +--ro output
|     |        |     |  |              |           +--ro certif\
\icate-signing-request
|     |        |     |  |              |                   bina\
\ry
|     |        |     |  |              +--:(keystore)
|     |        |     |  |                       {keystore-suppo\
\rted}?
|     |        |     |  |                 +--rw keystore-refere\
\nce
|     |        |     |  |                    +--rw asymmetric-k\
\ey?
|     |        |     |  |                    |       ks:asymmet\
\ric-key-ref
|     |        |     |  |                    +--rw certificate?\
\      leafref
|     |        |     |  +--rw server-authentication
|     |        |     |  |  +--rw ssh-host-keys!
|     |        |     |  |  |  +--rw (local-or-truststore)
|     |        |     |  |  |     +--:(local)
|     |        |     |  |  |     |        {local-definitions-su\
\pported}?
|     |        |     |  |  |     |  +--rw local-definition
|     |        |     |  |  |     |     +--rw public-key* [name]
|     |        |     |  |  |     |        +--rw name
|     |        |     |  |  |     |        |       string
|     |        |     |  |  |     |        +--rw algorithm
|     |        |     |  |  |     |        |       iasa:asymmetr\
\ic-algorithm-type
|     |        |     |  |  |     |        +--rw public-key-form\
\at
|     |        |     |  |  |     |        |       identityref
|     |        |     |  |  |     |        +--rw public-key
|     |        |     |  |  |     |                binary
|     |        |     |  |  |     +--:(truststore)
|     |        |     |  |  |              {truststore-supported\
\,public-keys}?
|     |        |     |  |  |        +--rw truststore-reference?
|     |        |     |  |  |                ts:public-key-bag-r\
\ef
|     |        |     |  |  +--rw ca-certs!
|     |        |     |  |  |       {sshcmn:ssh-x509-certs}?
|     |        |     |  |  |  +--rw (local-or-truststore)

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Internet-Draft      NETCONF Client and Server Models          March 2020

|     |        |     |  |  |     +--:(local)
|     |        |     |  |  |     |        {local-definitions-su\
\pported}?
|     |        |     |  |  |     |  +--rw local-definition
|     |        |     |  |  |     |     +--rw cert*
|     |        |     |  |  |     |     |       trust-anchor-cer\
\t-cms
|     |        |     |  |  |     |     +---n certificate-expira\
\tion
|     |        |     |  |  |     |        +-- expiration-date
|     |        |     |  |  |     |                yang:date-and\
\-time
|     |        |     |  |  |     +--:(truststore)
|     |        |     |  |  |              {truststore-supported\
\,x509-certificates}?
|     |        |     |  |  |        +--rw truststore-reference?
|     |        |     |  |  |                ts:certificate-bag-\
\ref
|     |        |     |  |  +--rw server-certs!
|     |        |     |  |          {sshcmn:ssh-x509-certs}?
|     |        |     |  |     +--rw (local-or-truststore)
|     |        |     |  |        +--:(local)
|     |        |     |  |        |        {local-definitions-su\
\pported}?
|     |        |     |  |        |  +--rw local-definition
|     |        |     |  |        |     +--rw cert*
|     |        |     |  |        |     |       trust-anchor-cer\
\t-cms
|     |        |     |  |        |     +---n certificate-expira\
\tion
|     |        |     |  |        |        +-- expiration-date
|     |        |     |  |        |                yang:date-and\
\-time
|     |        |     |  |        +--:(truststore)
|     |        |     |  |                 {truststore-supported\
\,x509-certificates}?
|     |        |     |  |           +--rw truststore-reference?
|     |        |     |  |                   ts:certificate-bag-\
\ref
|     |        |     |  +--rw transport-params
|     |        |     |  |       {ssh-client-transport-params-co\
\nfig}?
|     |        |     |  |  +--rw host-key
|     |        |     |  |  |  +--rw host-key-alg*   identityref
|     |        |     |  |  +--rw key-exchange
|     |        |     |  |  |  +--rw key-exchange-alg*
|     |        |     |  |  |          identityref
|     |        |     |  |  +--rw encryption

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Internet-Draft      NETCONF Client and Server Models          March 2020

|     |        |     |  |  |  +--rw encryption-alg*
|     |        |     |  |  |          identityref
|     |        |     |  |  +--rw mac
|     |        |     |  |     +--rw mac-alg*   identityref
|     |        |     |  +--rw keepalives!
|     |        |     |          {ssh-client-keepalives}?
|     |        |     |     +--rw max-wait?       uint16
|     |        |     |     +--rw max-attempts?   uint8
|     |        |     +--rw netconf-client-parameters
|     |        +--:(tls) {tls-initiate}?
|     |           +--rw tls
|     |              +--rw tcp-client-parameters
|     |              |  +--rw remote-address    inet:host
|     |              |  +--rw remote-port?      inet:port-number
|     |              |  |       {local-binding-supported}?
|     |              |  +--rw local-port?       inet:port-number
|     |              |  |       {local-binding-supported}?
|     |              |  +--rw keepalives!
|     |              |          {keepalives-supported}?
|     |              |     +--rw idle-time         uint16
|     |              |     +--rw max-probes        uint16
|     |              |     +--rw probe-interval    uint16
|     |              +--rw tls-client-parameters
|     |              |  +--rw client-identity
|     |              |  |  +--rw (auth-type)?
|     |              |  |     +--:(certificate)
|     |              |  |     |        {x509-certificate-auth}?
|     |              |  |     |  +--rw certificate
|     |              |  |     |     +--rw (local-or-keystore)
|     |              |  |     |        +--:(local)
|     |              |  |     |        |        {local-definiti\
\ons-supported}?
|     |              |  |     |        |  +--rw local-definition
|     |              |  |     |        |     +--rw algorithm
|     |              |  |     |        |     |       iasa:asymm\
\etric-algorithm-type
|     |              |  |     |        |     +--rw public-key-f\
\ormat
|     |              |  |     |        |     |       identityref
|     |              |  |     |        |     +--rw public-key
|     |              |  |     |        |     |       binary
|     |              |  |     |        |     +--rw private-key-\
\format?
|     |              |  |     |        |     |       identityref
|     |              |  |     |        |     +--rw (private-key\
\-type)
|     |              |  |     |        |     |  +--:(private-ke\

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Internet-Draft      NETCONF Client and Server Models          March 2020

\y)
|     |              |  |     |        |     |  |  +--rw privat\
\e-key?
|     |              |  |     |        |     |  |          bina\
\ry
|     |              |  |     |        |     |  +--:(hidden-pri\
\vate-key)
|     |              |  |     |        |     |  |  +--rw hidden\
\-private-key?
|     |              |  |     |        |     |  |          empty
|     |              |  |     |        |     |  +--:(encrypted-\
\private-key)
|     |              |  |     |        |     |     +--rw encryp\
\ted-private-key
|     |              |  |     |        |     |        +--rw (ke\
\y-type)
|     |              |  |     |        |     |        |  +--:(s\
\ymmetric-key-ref)
|     |              |  |     |        |     |        |  |  +--\
\rw symmetric-key-ref?    leafref
|     |              |  |     |        |     |        |  |     \
\     {keystore-supported}?
|     |              |  |     |        |     |        |  +--:(a\
\symmetric-key-ref)
|     |              |  |     |        |     |        |     +--\
\rw asymmetric-key-ref?   leafref
|     |              |  |     |        |     |        |        \
\     {keystore-supported}?
|     |              |  |     |        |     |        +--rw val\
\ue?
|     |              |  |     |        |     |                b\
\inary
|     |              |  |     |        |     +--rw cert?
|     |              |  |     |        |     |       end-entity\
\-cert-cms
|     |              |  |     |        |     +---n certificate-\
\expiration
|     |              |  |     |        |     |  +-- expiration-\
\date
|     |              |  |     |        |     |          yang:da\
\te-and-time
|     |              |  |     |        |     +---x generate-cer\
\tificate-signing-request
|     |              |  |     |        |        +---w input
|     |              |  |     |        |        |  +---w subject
|     |              |  |     |        |        |  |       bina\
\ry
|     |              |  |     |        |        |  +---w attrib\

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Internet-Draft      NETCONF Client and Server Models          March 2020

\utes?
|     |              |  |     |        |        |          bina\
\ry
|     |              |  |     |        |        +--ro output
|     |              |  |     |        |           +--ro certif\
\icate-signing-request
|     |              |  |     |        |                   bina\
\ry
|     |              |  |     |        +--:(keystore)
|     |              |  |     |                 {keystore-suppo\
\rted}?
|     |              |  |     |           +--rw keystore-refere\
\nce
|     |              |  |     |              +--rw asymmetric-k\
\ey?
|     |              |  |     |              |       ks:asymmet\
\ric-key-ref
|     |              |  |     |              +--rw certificate?\
\      leafref
|     |              |  |     +--:(raw-public-key)
|     |              |  |     |        {raw-public-key-auth}?
|     |              |  |     |  +--rw raw-private-key
|     |              |  |     |     +--rw (local-or-keystore)
|     |              |  |     |        +--:(local)
|     |              |  |     |        |        {local-definiti\
\ons-supported}?
|     |              |  |     |        |  +--rw local-definition
|     |              |  |     |        |     +--rw algorithm
|     |              |  |     |        |     |       iasa:asymm\
\etric-algorithm-type
|     |              |  |     |        |     +--rw public-key-f\
\ormat
|     |              |  |     |        |     |       identityref
|     |              |  |     |        |     +--rw public-key
|     |              |  |     |        |     |       binary
|     |              |  |     |        |     +--rw private-key-\
\format?
|     |              |  |     |        |     |       identityref
|     |              |  |     |        |     +--rw (private-key\
\-type)
|     |              |  |     |        |        +--:(private-ke\
\y)
|     |              |  |     |        |        |  +--rw privat\
\e-key?
|     |              |  |     |        |        |          bina\
\ry
|     |              |  |     |        |        +--:(hidden-pri\
\vate-key)

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Internet-Draft      NETCONF Client and Server Models          March 2020

|     |              |  |     |        |        |  +--rw hidden\
\-private-key?
|     |              |  |     |        |        |          empty
|     |              |  |     |        |        +--:(encrypted-\
\private-key)
|     |              |  |     |        |           +--rw encryp\
\ted-private-key
|     |              |  |     |        |              +--rw (ke\
\y-type)
|     |              |  |     |        |              |  +--:(s\
\ymmetric-key-ref)
|     |              |  |     |        |              |  |  +--\
\rw symmetric-key-ref?    leafref
|     |              |  |     |        |              |  |     \
\     {keystore-supported}?
|     |              |  |     |        |              |  +--:(a\
\symmetric-key-ref)
|     |              |  |     |        |              |     +--\
\rw asymmetric-key-ref?   leafref
|     |              |  |     |        |              |        \
\     {keystore-supported}?
|     |              |  |     |        |              +--rw val\
\ue?
|     |              |  |     |        |                      b\
\inary
|     |              |  |     |        +--:(keystore)
|     |              |  |     |                 {keystore-suppo\
\rted}?
|     |              |  |     |           +--rw keystore-refere\
\nce?
|     |              |  |     |                   ks:asymmetric\
\-key-ref
|     |              |  |     +--:(psk) {psk-auth}?
|     |              |  |        +--rw psk
|     |              |  |           +--rw (local-or-keystore)
|     |              |  |              +--:(local)
|     |              |  |              |        {local-definiti\
\ons-supported}?
|     |              |  |              |  +--rw local-definition
|     |              |  |              |     +--rw algorithm
|     |              |  |              |     |       isa:symmet\
\ric-algorithm-type
|     |              |  |              |     +--rw key-format?
|     |              |  |              |     |       identityref
|     |              |  |              |     +--rw (key-type)
|     |              |  |              |     |  +--:(key)
|     |              |  |              |     |  |  +--rw key?
|     |              |  |              |     |  |          bina\

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Internet-Draft      NETCONF Client and Server Models          March 2020

\ry
|     |              |  |              |     |  +--:(hidden-key)
|     |              |  |              |     |  |  +--rw hidden\
\-key?
|     |              |  |              |     |  |          empty
|     |              |  |              |     |  +--:(encrypted-\
\key)
|     |              |  |              |     |     +--rw encryp\
\ted-key
|     |              |  |              |     |        +--rw (ke\
\y-type)
|     |              |  |              |     |        |  +--:(s\
\ymmetric-key-ref)
|     |              |  |              |     |        |  |  +--\
\rw symmetric-key-ref?    leafref
|     |              |  |              |     |        |  |     \
\     {keystore-supported}?
|     |              |  |              |     |        |  +--:(a\
\symmetric-key-ref)
|     |              |  |              |     |        |     +--\
\rw asymmetric-key-ref?   leafref
|     |              |  |              |     |        |        \
\     {keystore-supported}?
|     |              |  |              |     |        +--rw val\
\ue?
|     |              |  |              |     |                b\
\inary
|     |              |  |              |     +--rw id?
|     |              |  |              |             string
|     |              |  |              |             {ks:local-\
\definitions-supported}?
|     |              |  |              +--:(keystore)
|     |              |  |                       {keystore-suppo\
\rted}?
|     |              |  |                 +--rw keystore-refere\
\nce?
|     |              |  |                         ks:symmetric-\
\key-ref
|     |              |  +--rw server-authentication
|     |              |  |  +--rw ca-certs!
|     |              |  |  |       {x509-certificate-auth}?
|     |              |  |  |  +--rw (local-or-truststore)
|     |              |  |  |     +--:(local)
|     |              |  |  |     |        {local-definitions-su\
\pported}?
|     |              |  |  |     |  +--rw local-definition
|     |              |  |  |     |     +--rw cert*
|     |              |  |  |     |     |       trust-anchor-cer\

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Internet-Draft      NETCONF Client and Server Models          March 2020

\t-cms
|     |              |  |  |     |     +---n certificate-expira\
\tion
|     |              |  |  |     |        +-- expiration-date
|     |              |  |  |     |                yang:date-and\
\-time
|     |              |  |  |     +--:(truststore)
|     |              |  |  |              {truststore-supported\
\,x509-certificates}?
|     |              |  |  |        +--rw truststore-reference?
|     |              |  |  |                ts:certificate-bag-\
\ref
|     |              |  |  +--rw server-certs!
|     |              |  |  |       {x509-certificate-auth}?
|     |              |  |  |  +--rw (local-or-truststore)
|     |              |  |  |     +--:(local)
|     |              |  |  |     |        {local-definitions-su\
\pported}?
|     |              |  |  |     |  +--rw local-definition
|     |              |  |  |     |     +--rw cert*
|     |              |  |  |     |     |       trust-anchor-cer\
\t-cms
|     |              |  |  |     |     +---n certificate-expira\
\tion
|     |              |  |  |     |        +-- expiration-date
|     |              |  |  |     |                yang:date-and\
\-time
|     |              |  |  |     +--:(truststore)
|     |              |  |  |              {truststore-supported\
\,x509-certificates}?
|     |              |  |  |        +--rw truststore-reference?
|     |              |  |  |                ts:certificate-bag-\
\ref
|     |              |  |  +--rw raw-public-keys!
|     |              |  |  |       {raw-public-key-auth}?
|     |              |  |  |  +--rw (local-or-truststore)
|     |              |  |  |     +--:(local)
|     |              |  |  |     |        {local-definitions-su\
\pported}?
|     |              |  |  |     |  +--rw local-definition
|     |              |  |  |     |     +--rw public-key* [name]
|     |              |  |  |     |        +--rw name
|     |              |  |  |     |        |       string
|     |              |  |  |     |        +--rw algorithm
|     |              |  |  |     |        |       iasa:asymmetr\
\ic-algorithm-type
|     |              |  |  |     |        +--rw public-key-form\
\at

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Internet-Draft      NETCONF Client and Server Models          March 2020

|     |              |  |  |     |        |       identityref
|     |              |  |  |     |        +--rw public-key
|     |              |  |  |     |                binary
|     |              |  |  |     +--:(truststore)
|     |              |  |  |              {truststore-supported\
\,public-keys}?
|     |              |  |  |        +--rw truststore-reference?
|     |              |  |  |                ts:public-key-bag-r\
\ef
|     |              |  |  +--rw psks! {psk-auth}?
|     |              |  +--rw hello-params
|     |              |  |       {tls-client-hello-params-config\
\}?
|     |              |  |  +--rw tls-versions
|     |              |  |  |  +--rw tls-version*   identityref
|     |              |  |  +--rw cipher-suites
|     |              |  |     +--rw cipher-suite*   identityref
|     |              |  +--rw keepalives!
|     |              |          {tls-client-keepalives}?
|     |              |     +--rw max-wait?       uint16
|     |              |     +--rw max-attempts?   uint8
|     |              +--rw netconf-client-parameters
|     +--rw connection-type
|     |  +--rw (connection-type)
|     |     +--:(persistent-connection)
|     |     |  +--rw persistent!
|     |     +--:(periodic-connection)
|     |        +--rw periodic!
|     |           +--rw period?         uint16
|     |           +--rw anchor-time?    yang:date-and-time
|     |           +--rw idle-timeout?   uint16
|     +--rw reconnect-strategy
|        +--rw start-with?     enumeration
|        +--rw max-attempts?   uint8
+--rw listen! {ssh-listen or tls-listen}?
+--rw idle-timeout?   uint16
+--rw endpoint* [name]
+--rw name         string
+--rw (transport)
+--:(ssh) {ssh-listen}?
|  +--rw ssh
|     +--rw tcp-server-parameters
|     |  +--rw local-port?      inet:port-number
|     |  +--rw keepalives! {keepalives-supported}?
|     |     +--rw idle-time         uint16
|     |     +--rw max-probes        uint16
|     |     +--rw probe-interval    uint16

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|     +--rw ssh-client-parameters
|     |  +--rw client-identity
|     |  |  +--rw username?            string
|     |  |  +--rw (auth-type)
|     |  |     +--:(public-key)
|     |  |     |  +--rw public-key
|     |  |     |     +--rw (local-or-keystore)
|     |  |     |        +--:(local)
|     |  |     |        |        {local-definitions-su\
\pported}?
|     |  |     |        |  +--rw local-definition
|     |  |     |        |     +--rw algorithm
|     |  |     |        |     |       iasa:asymmetric-\
\algorithm-type
|     |  |     |        |     +--rw public-key-format
|     |  |     |        |     |       identityref
|     |  |     |        |     +--rw public-key
|     |  |     |        |     |       binary
|     |  |     |        |     +--rw private-key-format?
|     |  |     |        |     |       identityref
|     |  |     |        |     +--rw (private-key-type)
|     |  |     |        |        +--:(private-key)
|     |  |     |        |        |  +--rw private-key?
|     |  |     |        |        |          binary
|     |  |     |        |        +--:(hidden-private-k\
\ey)
|     |  |     |        |        |  +--rw hidden-priva\
\te-key?
|     |  |     |        |        |          empty
|     |  |     |        |        +--:(encrypted-privat\
\e-key)
|     |  |     |        |           +--rw encrypted-pr\
\ivate-key
|     |  |     |        |              +--rw (key-type)
|     |  |     |        |              |  +--:(symmetr\
\ic-key-ref)
|     |  |     |        |              |  |  +--rw sym\
\metric-key-ref?    leafref
|     |  |     |        |              |  |          {\
\keystore-supported}?
|     |  |     |        |              |  +--:(asymmet\
\ric-key-ref)
|     |  |     |        |              |     +--rw asy\
\mmetric-key-ref?   leafref
|     |  |     |        |              |             {\
\keystore-supported}?
|     |  |     |        |              +--rw value?
|     |  |     |        |                      binary

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|     |  |     |        +--:(keystore)
|     |  |     |                 {keystore-supported}?
|     |  |     |           +--rw keystore-reference?
|     |  |     |                   ks:asymmetric-key-r\
\ef
|     |  |     |  +--rw password?      string
|     |  |     +--:(hostbased)
|     |  |     |  +--rw hostbased
|     |  |     |          {client-identity-hostbased}?
|     |  |     |     +--rw (local-or-keystore)
|     |  |     |        +--:(local)
|     |  |     |        |        {local-definitions-su\
\pported}?
|     |  |     |        |  +--rw local-definition
|     |  |     |        |     +--rw algorithm
|     |  |     |        |     |       iasa:asymmetric-\
\algorithm-type
|     |  |     |        |     +--rw public-key-format
|     |  |     |        |     |       identityref
|     |  |     |        |     +--rw public-key
|     |  |     |        |     |       binary
|     |  |     |        |     +--rw private-key-format?
|     |  |     |        |     |       identityref
|     |  |     |        |     +--rw (private-key-type)
|     |  |     |        |        +--:(private-key)
|     |  |     |        |        |  +--rw private-key?
|     |  |     |        |        |          binary
|     |  |     |        |        +--:(hidden-private-k\
\ey)
|     |  |     |        |        |  +--rw hidden-priva\
\te-key?
|     |  |     |        |        |          empty
|     |  |     |        |        +--:(encrypted-privat\
\e-key)
|     |  |     |        |           +--rw encrypted-pr\
\ivate-key
|     |  |     |        |              +--rw (key-type)
|     |  |     |        |              |  +--:(symmetr\
\ic-key-ref)
|     |  |     |        |              |  |  +--rw sym\
\metric-key-ref?    leafref
|     |  |     |        |              |  |          {\
\keystore-supported}?
|     |  |     |        |              |  +--:(asymmet\
\ric-key-ref)
|     |  |     |        |              |     +--rw asy\

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\mmetric-key-ref?   leafref
|     |  |     |        |              |             {\
\keystore-supported}?
|     |  |     |        |              +--rw value?
|     |  |     |        |                      binary
|     |  |     |        +--:(keystore)
|     |  |     |                 {keystore-supported}?
|     |  |     |           +--rw keystore-reference?
|     |  |     |                   ks:asymmetric-key-r\
\ef
|     |  |     +--:(none)
|     |  |     |  +--rw none?          empty
|     |  |     |          {client-identity-none}?
|     |  |     +--:(certificate)
|     |  |        +--rw certificate
|     |  |                {sshcmn:ssh-x509-certs}?
|     |  |           +--rw (local-or-keystore)
|     |  |              +--:(local)
|     |  |              |        {local-definitions-su\
\pported}?
|     |  |              |  +--rw local-definition
|     |  |              |     +--rw algorithm
|     |  |              |     |       iasa:asymmetric-\
\algorithm-type
|     |  |              |     +--rw public-key-format
|     |  |              |     |       identityref
|     |  |              |     +--rw public-key
|     |  |              |     |       binary
|     |  |              |     +--rw private-key-format?
|     |  |              |     |       identityref
|     |  |              |     +--rw (private-key-type)
|     |  |              |     |  +--:(private-key)
|     |  |              |     |  |  +--rw private-key?
|     |  |              |     |  |          binary
|     |  |              |     |  +--:(hidden-private-k\
\ey)
|     |  |              |     |  |  +--rw hidden-priva\
\te-key?
|     |  |              |     |  |          empty
|     |  |              |     |  +--:(encrypted-privat\
\e-key)
|     |  |              |     |     +--rw encrypted-pr\
\ivate-key
|     |  |              |     |        +--rw (key-type)
|     |  |              |     |        |  +--:(symmetr\
\ic-key-ref)
|     |  |              |     |        |  |  +--rw sym\
\metric-key-ref?    leafref

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|     |  |              |     |        |  |          {\
\keystore-supported}?
|     |  |              |     |        |  +--:(asymmet\
\ric-key-ref)
|     |  |              |     |        |     +--rw asy\
\mmetric-key-ref?   leafref
|     |  |              |     |        |             {\
\keystore-supported}?
|     |  |              |     |        +--rw value?
|     |  |              |     |                binary
|     |  |              |     +--rw cert?
|     |  |              |     |       end-entity-cert-\
\cms
|     |  |              |     +---n certificate-expira\
\tion
|     |  |              |     |  +-- expiration-date
|     |  |              |     |          yang:date-and\
\-time
|     |  |              |     +---x generate-certifica\
\te-signing-request
|     |  |              |        +---w input
|     |  |              |        |  +---w subject
|     |  |              |        |  |       binary
|     |  |              |        |  +---w attributes?
|     |  |              |        |          binary
|     |  |              |        +--ro output
|     |  |              |           +--ro certificate-\
\signing-request
|     |  |              |                   binary
|     |  |              +--:(keystore)
|     |  |                       {keystore-supported}?
|     |  |                 +--rw keystore-reference
|     |  |                    +--rw asymmetric-key?
|     |  |                    |       ks:asymmetric-ke\
\y-ref
|     |  |                    +--rw certificate?      \
\leafref
|     |  +--rw server-authentication
|     |  |  +--rw ssh-host-keys!
|     |  |  |  +--rw (local-or-truststore)
|     |  |  |     +--:(local)
|     |  |  |     |        {local-definitions-supporte\
\d}?
|     |  |  |     |  +--rw local-definition
|     |  |  |     |     +--rw public-key* [name]
|     |  |  |     |        +--rw name
|     |  |  |     |        |       string
|     |  |  |     |        +--rw algorithm

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|     |  |  |     |        |       iasa:asymmetric-alg\
\orithm-type
|     |  |  |     |        +--rw public-key-format
|     |  |  |     |        |       identityref
|     |  |  |     |        +--rw public-key
|     |  |  |     |                binary
|     |  |  |     +--:(truststore)
|     |  |  |              {truststore-supported,publi\
\c-keys}?
|     |  |  |        +--rw truststore-reference?
|     |  |  |                ts:public-key-bag-ref
|     |  |  +--rw ca-certs! {sshcmn:ssh-x509-certs}?
|     |  |  |  +--rw (local-or-truststore)
|     |  |  |     +--:(local)
|     |  |  |     |        {local-definitions-supporte\
\d}?
|     |  |  |     |  +--rw local-definition
|     |  |  |     |     +--rw cert*
|     |  |  |     |     |       trust-anchor-cert-cms
|     |  |  |     |     +---n certificate-expiration
|     |  |  |     |        +-- expiration-date
|     |  |  |     |                yang:date-and-time
|     |  |  |     +--:(truststore)
|     |  |  |              {truststore-supported,x509-\
\certificates}?
|     |  |  |        +--rw truststore-reference?
|     |  |  |                ts:certificate-bag-ref
|     |  |  +--rw server-certs!
|     |  |          {sshcmn:ssh-x509-certs}?
|     |  |     +--rw (local-or-truststore)
|     |  |        +--:(local)
|     |  |        |        {local-definitions-supporte\
\d}?
|     |  |        |  +--rw local-definition
|     |  |        |     +--rw cert*
|     |  |        |     |       trust-anchor-cert-cms
|     |  |        |     +---n certificate-expiration
|     |  |        |        +-- expiration-date
|     |  |        |                yang:date-and-time
|     |  |        +--:(truststore)
|     |  |                 {truststore-supported,x509-\
\certificates}?
|     |  |           +--rw truststore-reference?
|     |  |                   ts:certificate-bag-ref
|     |  +--rw transport-params
|     |  |       {ssh-client-transport-params-config}?
|     |  |  +--rw host-key
|     |  |  |  +--rw host-key-alg*   identityref

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|     |  |  +--rw key-exchange
|     |  |  |  +--rw key-exchange-alg*   identityref
|     |  |  +--rw encryption
|     |  |  |  +--rw encryption-alg*   identityref
|     |  |  +--rw mac
|     |  |     +--rw mac-alg*   identityref
|     |  +--rw keepalives! {ssh-client-keepalives}?
|     |     +--rw max-wait?       uint16
|     |     +--rw max-attempts?   uint8
|     +--rw netconf-client-parameters
+--:(tls) {tls-listen}?
+--rw tls
+--rw tcp-server-parameters
|  +--rw local-port?      inet:port-number
|  +--rw keepalives! {keepalives-supported}?
|     +--rw idle-time         uint16
|     +--rw max-probes        uint16
|     +--rw probe-interval    uint16
+--rw tls-client-parameters
|  +--rw client-identity
|  |  +--rw (auth-type)?
|  |     +--:(certificate)
|  |     |        {x509-certificate-auth}?
|  |     |  +--rw certificate
|  |     |     +--rw (local-or-keystore)
|  |     |        +--:(local)
|  |     |        |        {local-definitions-su\
\pported}?
|  |     |        |  +--rw local-definition
|  |     |        |     +--rw algorithm
|  |     |        |     |       iasa:asymmetric-\
\algorithm-type
|  |     |        |     +--rw public-key-format
|  |     |        |     |       identityref
|  |     |        |     +--rw public-key
|  |     |        |     |       binary
|  |     |        |     +--rw private-key-format?
|  |     |        |     |       identityref
|  |     |        |     +--rw (private-key-type)
|  |     |        |     |  +--:(private-key)
|  |     |        |     |  |  +--rw private-key?
|  |     |        |     |  |          binary
|  |     |        |     |  +--:(hidden-private-k\
\ey)
|  |     |        |     |  |  +--rw hidden-priva\
\te-key?
|  |     |        |     |  |          empty

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|  |     |        |     |  +--:(encrypted-privat\
\e-key)
|  |     |        |     |     +--rw encrypted-pr\
\ivate-key
|  |     |        |     |        +--rw (key-type)
|  |     |        |     |        |  +--:(symmetr\
\ic-key-ref)
|  |     |        |     |        |  |  +--rw sym\
\metric-key-ref?    leafref
|  |     |        |     |        |  |          {\
\keystore-supported}?
|  |     |        |     |        |  +--:(asymmet\
\ric-key-ref)
|  |     |        |     |        |     +--rw asy\
\mmetric-key-ref?   leafref
|  |     |        |     |        |             {\
\keystore-supported}?
|  |     |        |     |        +--rw value?
|  |     |        |     |                binary
|  |     |        |     +--rw cert?
|  |     |        |     |       end-entity-cert-\
\cms
|  |     |        |     +---n certificate-expira\
\tion
|  |     |        |     |  +-- expiration-date
|  |     |        |     |          yang:date-and\
\-time
|  |     |        |     +---x generate-certifica\
\te-signing-request
|  |     |        |        +---w input
|  |     |        |        |  +---w subject
|  |     |        |        |  |       binary
|  |     |        |        |  +---w attributes?
|  |     |        |        |          binary
|  |     |        |        +--ro output
|  |     |        |           +--ro certificate-\
\signing-request
|  |     |        |                   binary
|  |     |        +--:(keystore)
|  |     |                 {keystore-supported}?
|  |     |           +--rw keystore-reference
|  |     |              +--rw asymmetric-key?
|  |     |              |       ks:asymmetric-ke\
\y-ref
|  |     |              +--rw certificate?      \
\leafref
|  |     +--:(raw-public-key)
|  |     |        {raw-public-key-auth}?

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|  |     |  +--rw raw-private-key
|  |     |     +--rw (local-or-keystore)
|  |     |        +--:(local)
|  |     |        |        {local-definitions-su\
\pported}?
|  |     |        |  +--rw local-definition
|  |     |        |     +--rw algorithm
|  |     |        |     |       iasa:asymmetric-\
\algorithm-type
|  |     |        |     +--rw public-key-format
|  |     |        |     |       identityref
|  |     |        |     +--rw public-key
|  |     |        |     |       binary
|  |     |        |     +--rw private-key-format?
|  |     |        |     |       identityref
|  |     |        |     +--rw (private-key-type)
|  |     |        |        +--:(private-key)
|  |     |        |        |  +--rw private-key?
|  |     |        |        |          binary
|  |     |        |        +--:(hidden-private-k\
\ey)
|  |     |        |        |  +--rw hidden-priva\
\te-key?
|  |     |        |        |          empty
|  |     |        |        +--:(encrypted-privat\
\e-key)
|  |     |        |           +--rw encrypted-pr\
\ivate-key
|  |     |        |              +--rw (key-type)
|  |     |        |              |  +--:(symmetr\
\ic-key-ref)
|  |     |        |              |  |  +--rw sym\
\metric-key-ref?    leafref
|  |     |        |              |  |          {\
\keystore-supported}?
|  |     |        |              |  +--:(asymmet\
\ric-key-ref)
|  |     |        |              |     +--rw asy\
\mmetric-key-ref?   leafref
|  |     |        |              |             {\
\keystore-supported}?
|  |     |        |              +--rw value?
|  |     |        |                      binary
|  |     |        +--:(keystore)
|  |     |                 {keystore-supported}?
|  |     |           +--rw keystore-reference?
|  |     |                   ks:asymmetric-key-r\
\ef

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|  |     +--:(psk) {psk-auth}?
|  |        +--rw psk
|  |           +--rw (local-or-keystore)
|  |              +--:(local)
|  |              |        {local-definitions-su\
\pported}?
|  |              |  +--rw local-definition
|  |              |     +--rw algorithm
|  |              |     |       isa:symmetric-al\
\gorithm-type
|  |              |     +--rw key-format?
|  |              |     |       identityref
|  |              |     +--rw (key-type)
|  |              |     |  +--:(key)
|  |              |     |  |  +--rw key?
|  |              |     |  |          binary
|  |              |     |  +--:(hidden-key)
|  |              |     |  |  +--rw hidden-key?
|  |              |     |  |          empty
|  |              |     |  +--:(encrypted-key)
|  |              |     |     +--rw encrypted-key
|  |              |     |        +--rw (key-type)
|  |              |     |        |  +--:(symmetr\
\ic-key-ref)
|  |              |     |        |  |  +--rw sym\
\metric-key-ref?    leafref
|  |              |     |        |  |          {\
\keystore-supported}?
|  |              |     |        |  +--:(asymmet\
\ric-key-ref)
|  |              |     |        |     +--rw asy\
\mmetric-key-ref?   leafref
|  |              |     |        |             {\
\keystore-supported}?
|  |              |     |        +--rw value?
|  |              |     |                binary
|  |              |     +--rw id?
|  |              |             string
|  |              |             {ks:local-defini\
\tions-supported}?
|  |              +--:(keystore)
|  |                       {keystore-supported}?
|  |                 +--rw keystore-reference?
|  |                         ks:symmetric-key-ref
|  +--rw server-authentication
|  |  +--rw ca-certs! {x509-certificate-auth}?
|  |  |  +--rw (local-or-truststore)
|  |  |     +--:(local)

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|  |  |     |        {local-definitions-supporte\
\d}?
|  |  |     |  +--rw local-definition
|  |  |     |     +--rw cert*
|  |  |     |     |       trust-anchor-cert-cms
|  |  |     |     +---n certificate-expiration
|  |  |     |        +-- expiration-date
|  |  |     |                yang:date-and-time
|  |  |     +--:(truststore)
|  |  |              {truststore-supported,x509-\
\certificates}?
|  |  |        +--rw truststore-reference?
|  |  |                ts:certificate-bag-ref
|  |  +--rw server-certs!
|  |  |       {x509-certificate-auth}?
|  |  |  +--rw (local-or-truststore)
|  |  |     +--:(local)
|  |  |     |        {local-definitions-supporte\
\d}?
|  |  |     |  +--rw local-definition
|  |  |     |     +--rw cert*
|  |  |     |     |       trust-anchor-cert-cms
|  |  |     |     +---n certificate-expiration
|  |  |     |        +-- expiration-date
|  |  |     |                yang:date-and-time
|  |  |     +--:(truststore)
|  |  |              {truststore-supported,x509-\
\certificates}?
|  |  |        +--rw truststore-reference?
|  |  |                ts:certificate-bag-ref
|  |  +--rw raw-public-keys!
|  |  |       {raw-public-key-auth}?
|  |  |  +--rw (local-or-truststore)
|  |  |     +--:(local)
|  |  |     |        {local-definitions-supporte\
\d}?
|  |  |     |  +--rw local-definition
|  |  |     |     +--rw public-key* [name]
|  |  |     |        +--rw name
|  |  |     |        |       string
|  |  |     |        +--rw algorithm
|  |  |     |        |       iasa:asymmetric-alg\
\orithm-type
|  |  |     |        +--rw public-key-format
|  |  |     |        |       identityref
|  |  |     |        +--rw public-key
|  |  |     |                binary
|  |  |     +--:(truststore)

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|  |  |              {truststore-supported,publi\
\c-keys}?
|  |  |        +--rw truststore-reference?
|  |  |                ts:public-key-bag-ref
|  |  +--rw psks! {psk-auth}?
|  +--rw hello-params
|  |       {tls-client-hello-params-config}?
|  |  +--rw tls-versions
|  |  |  +--rw tls-version*   identityref
|  |  +--rw cipher-suites
|  |     +--rw cipher-suite*   identityref
|  +--rw keepalives! {tls-client-keepalives}?
|     +--rw max-wait?       uint16
|     +--rw max-attempts?   uint8
+--rw netconf-client-parameters

A.2.  Expanded Tree Diagram for 'ietf-netconf-server'

The following tree diagram [RFC8340] provides an overview of the data
model for the "ietf-netconf-server" module.

This tree diagram shows all the nodes defined in this module,
including those defined by "grouping" statements used by this module.

Please see Section 4.1 for a tree diagram that illustrates what the
module looks like without all the "grouping" statements expanded.

========== NOTE: '\\' line wrapping per BCP XXX (RFC XXXX) ==========

module: ietf-netconf-server
+--rw netconf-server
+--rw listen! {ssh-listen or tls-listen}?
|  +--rw idle-timeout?   uint16
|  +--rw endpoint* [name]
|     +--rw name         string
|     +--rw (transport)
|        +--:(ssh) {ssh-listen}?
|        |  +--rw ssh
|        |     +--rw tcp-server-parameters
|        |     |  +--rw local-port?      inet:port-number
|        |     |  +--rw keepalives! {keepalives-supported}?
|        |     |     +--rw idle-time         uint16
|        |     |     +--rw max-probes        uint16
|        |     |     +--rw probe-interval    uint16
|        |     +--rw ssh-server-parameters
|        |     |  +--rw server-identity
|        |     |  |  +--rw host-key* [name]

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|        |     |  |     +--rw name                 string
|        |     |  |     +--rw (host-key-type)
|        |     |  |        +--:(public-key)
|        |     |  |        |  +--rw public-key
|        |     |  |        |     +--rw (local-or-keystore)
|        |     |  |        |        +--:(local)
|        |     |  |        |        |        {local-definitions\
\-supported}?
|        |     |  |        |        |  +--rw local-definition
|        |     |  |        |        |     +--rw algorithm
|        |     |  |        |        |     |       iasa:asymmetr\
\ic-algorithm-type
|        |     |  |        |        |     +--rw public-key-form\
\at
|        |     |  |        |        |     |       identityref
|        |     |  |        |        |     +--rw public-key
|        |     |  |        |        |     |       binary
|        |     |  |        |        |     +--rw private-key-for\
\mat?
|        |     |  |        |        |     |       identityref
|        |     |  |        |        |     +--rw (private-key-ty\
\pe)
|        |     |  |        |        |        +--:(private-key)
|        |     |  |        |        |        |  +--rw private-k\
\ey?
|        |     |  |        |        |        |          binary
|        |     |  |        |        |        +--:(hidden-privat\
\e-key)
|        |     |  |        |        |        |  +--rw hidden-pr\
\ivate-key?
|        |     |  |        |        |        |          empty
|        |     |  |        |        |        +--:(encrypted-pri\
\vate-key)
|        |     |  |        |        |           +--rw encrypted\
\-private-key
|        |     |  |        |        |              +--rw (key-t\
\ype)
|        |     |  |        |        |              |  +--:(symm\
\etric-key-ref)
|        |     |  |        |        |              |  |  +--rw \
\symmetric-key-ref?    leafref
|        |     |  |        |        |              |  |        \
\  {keystore-supported}?
|        |     |  |        |        |              |  +--:(asym\
\metric-key-ref)
|        |     |  |        |        |              |     +--rw \
\asymmetric-key-ref?   leafref
|        |     |  |        |        |              |           \

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\  {keystore-supported}?
|        |     |  |        |        |              +--rw value?
|        |     |  |        |        |                      bina\
\ry
|        |     |  |        |        +--:(keystore)
|        |     |  |        |                 {keystore-supporte\
\d}?
|        |     |  |        |           +--rw keystore-reference?
|        |     |  |        |                   ks:asymmetric-ke\
\y-ref
|        |     |  |        +--:(certificate)
|        |     |  |           +--rw certificate
|        |     |  |                   {sshcmn:ssh-x509-certs}?
|        |     |  |              +--rw (local-or-keystore)
|        |     |  |                 +--:(local)
|        |     |  |                 |        {local-definitions\
\-supported}?
|        |     |  |                 |  +--rw local-definition
|        |     |  |                 |     +--rw algorithm
|        |     |  |                 |     |       iasa:asymmetr\
\ic-algorithm-type
|        |     |  |                 |     +--rw public-key-form\
\at
|        |     |  |                 |     |       identityref
|        |     |  |                 |     +--rw public-key
|        |     |  |                 |     |       binary
|        |     |  |                 |     +--rw private-key-for\
\mat?
|        |     |  |                 |     |       identityref
|        |     |  |                 |     +--rw (private-key-ty\
\pe)
|        |     |  |                 |     |  +--:(private-key)
|        |     |  |                 |     |  |  +--rw private-k\
\ey?
|        |     |  |                 |     |  |          binary
|        |     |  |                 |     |  +--:(hidden-privat\
\e-key)
|        |     |  |                 |     |  |  +--rw hidden-pr\
\ivate-key?
|        |     |  |                 |     |  |          empty
|        |     |  |                 |     |  +--:(encrypted-pri\
\vate-key)
|        |     |  |                 |     |     +--rw encrypted\
\-private-key
|        |     |  |                 |     |        +--rw (key-t\
\ype)
|        |     |  |                 |     |        |  +--:(symm\
\etric-key-ref)

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|        |     |  |                 |     |        |  |  +--rw \
\symmetric-key-ref?    leafref
|        |     |  |                 |     |        |  |        \
\  {keystore-supported}?
|        |     |  |                 |     |        |  +--:(asym\
\metric-key-ref)
|        |     |  |                 |     |        |     +--rw \
\asymmetric-key-ref?   leafref
|        |     |  |                 |     |        |           \
\  {keystore-supported}?
|        |     |  |                 |     |        +--rw value?
|        |     |  |                 |     |                bina\
\ry
|        |     |  |                 |     +--rw cert?
|        |     |  |                 |     |       end-entity-ce\
\rt-cms
|        |     |  |                 |     +---n certificate-exp\
\iration
|        |     |  |                 |     |  +-- expiration-date
|        |     |  |                 |     |          yang:date-\
\and-time
|        |     |  |                 |     +---x generate-certif\
\icate-signing-request
|        |     |  |                 |        +---w input
|        |     |  |                 |        |  +---w subject
|        |     |  |                 |        |  |       binary
|        |     |  |                 |        |  +---w attribute\
\s?
|        |     |  |                 |        |          binary
|        |     |  |                 |        +--ro output
|        |     |  |                 |           +--ro certifica\
\te-signing-request
|        |     |  |                 |                   binary
|        |     |  |                 +--:(keystore)
|        |     |  |                          {keystore-supporte\
\d}?
|        |     |  |                    +--rw keystore-reference
|        |     |  |                       +--rw asymmetric-key?
|        |     |  |                       |       ks:asymmetric\
\-key-ref
|        |     |  |                       +--rw certificate?   \
\   leafref
|        |     |  +--rw client-authentication
|        |     |  |  +--rw supported-authentication-methods
|        |     |  |  |  +--rw publickey?   empty
|        |     |  |  |  +--rw passsword?   empty
|        |     |  |  |  |       {client-auth-password}?
|        |     |  |  |  +--rw hostbased?   empty

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|        |     |  |  |  |       {client-auth-hostbased}?
|        |     |  |  |  +--rw none?        empty
|        |     |  |  |          {client-auth-none}?
|        |     |  |  +--rw users {client-auth-config-supported}?
|        |     |  |  |  +--rw user* [name]
|        |     |  |  |     +--rw name           string
|        |     |  |  |     +--rw public-keys!
|        |     |  |  |     |  +--rw (local-or-truststore)
|        |     |  |  |     |     +--:(local)
|        |     |  |  |     |     |        {local-definitions-su\
\pported}?
|        |     |  |  |     |     |  +--rw local-definition
|        |     |  |  |     |     |     +--rw public-key* [name]
|        |     |  |  |     |     |        +--rw name
|        |     |  |  |     |     |        |       string
|        |     |  |  |     |     |        +--rw algorithm
|        |     |  |  |     |     |        |       iasa:asymmetr\
\ic-algorithm-type
|        |     |  |  |     |     |        +--rw public-key-form\
\at
|        |     |  |  |     |     |        |       identityref
|        |     |  |  |     |     |        +--rw public-key
|        |     |  |  |     |     |                binary
|        |     |  |  |     |     +--:(truststore)
|        |     |  |  |     |              {truststore-supported\
\,public-keys}?
|        |     |  |  |     |        +--rw truststore-reference?
|        |     |  |  |     |                ts:public-key-bag-r\
\ef
|        |     |  |  |     +--rw password?
|        |     |  |  |     |       ianach:crypt-hash
|        |     |  |  |     |       {client-auth-password}?
|        |     |  |  |     +--rw hostbased!
|        |     |  |  |     |       {client-auth-hostbased}?
|        |     |  |  |     |  +--rw (local-or-truststore)
|        |     |  |  |     |     +--:(local)
|        |     |  |  |     |     |        {local-definitions-su\
\pported}?
|        |     |  |  |     |     |  +--rw local-definition
|        |     |  |  |     |     |     +--rw public-key* [name]
|        |     |  |  |     |     |        +--rw name
|        |     |  |  |     |     |        |       string
|        |     |  |  |     |     |        +--rw algorithm
|        |     |  |  |     |     |        |       iasa:asymmetr\
\ic-algorithm-type
|        |     |  |  |     |     |        +--rw public-key-form\
\at
|        |     |  |  |     |     |        |       identityref

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|        |     |  |  |     |     |        +--rw public-key
|        |     |  |  |     |     |                binary
|        |     |  |  |     |     +--:(truststore)
|        |     |  |  |     |              {truststore-supported\
\,public-keys}?
|        |     |  |  |     |        +--rw truststore-reference?
|        |     |  |  |     |                ts:public-key-bag-r\
\ef
|        |     |  |  |     +--rw none?          empty
|        |     |  |  |             {client-auth-none}?
|        |     |  |  +--rw ca-certs!
|        |     |  |  |       {client-auth-config-supported,sshc\
\mn:ssh-x509-certs}?
|        |     |  |  |  +--rw (local-or-truststore)
|        |     |  |  |     +--:(local)
|        |     |  |  |     |        {local-definitions-supporte\
\d}?
|        |     |  |  |     |  +--rw local-definition
|        |     |  |  |     |     +--rw cert*
|        |     |  |  |     |     |       trust-anchor-cert-cms
|        |     |  |  |     |     +---n certificate-expiration
|        |     |  |  |     |        +-- expiration-date
|        |     |  |  |     |                yang:date-and-time
|        |     |  |  |     +--:(truststore)
|        |     |  |  |              {truststore-supported,x509-\
\certificates}?
|        |     |  |  |        +--rw truststore-reference?
|        |     |  |  |                ts:certificate-bag-ref
|        |     |  |  +--rw client-certs!
|        |     |  |          {client-auth-config-supported,sshc\
\mn:ssh-x509-certs}?
|        |     |  |     +--rw (local-or-truststore)
|        |     |  |        +--:(local)
|        |     |  |        |        {local-definitions-supporte\
\d}?
|        |     |  |        |  +--rw local-definition
|        |     |  |        |     +--rw cert*
|        |     |  |        |     |       trust-anchor-cert-cms
|        |     |  |        |     +---n certificate-expiration
|        |     |  |        |        +-- expiration-date
|        |     |  |        |                yang:date-and-time
|        |     |  |        +--:(truststore)
|        |     |  |                 {truststore-supported,x509-\
\certificates}?
|        |     |  |           +--rw truststore-reference?
|        |     |  |                   ts:certificate-bag-ref
|        |     |  +--rw transport-params
|        |     |  |       {ssh-server-transport-params-config}?

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|        |     |  |  +--rw host-key
|        |     |  |  |  +--rw host-key-alg*   identityref
|        |     |  |  +--rw key-exchange
|        |     |  |  |  +--rw key-exchange-alg*   identityref
|        |     |  |  +--rw encryption
|        |     |  |  |  +--rw encryption-alg*   identityref
|        |     |  |  +--rw mac
|        |     |  |     +--rw mac-alg*   identityref
|        |     |  +--rw keepalives! {ssh-server-keepalives}?
|        |     |     +--rw max-wait?       uint16
|        |     |     +--rw max-attempts?   uint8
|        |     +--rw netconf-server-parameters
|        |        +--rw client-identity-mappings
|        |                {tls-listen or tls-call-home or sshcm\
\n:ssh-x509-certs}?
|        |           +--rw cert-to-name* [id]
|        |              +--rw id             uint32
|        |              +--rw fingerprint?
|        |              |       x509c2n:tls-fingerprint
|        |              +--rw map-type       identityref
|        |              +--rw name           string
|        +--:(tls) {tls-listen}?
|           +--rw tls
|              +--rw tcp-server-parameters
|              |  +--rw local-port?      inet:port-number
|              |  +--rw keepalives! {keepalives-supported}?
|              |     +--rw idle-time         uint16
|              |     +--rw max-probes        uint16
|              |     +--rw probe-interval    uint16
|              +--rw tls-server-parameters
|              |  +--rw server-identity
|              |  |  +--rw (auth-type)
|              |  |     +--:(certificate)
|              |  |     |        {x509-certificate-auth}?
|              |  |     |  +--rw certificate
|              |  |     |     +--rw (local-or-keystore)
|              |  |     |        +--:(local)
|              |  |     |        |        {local-definitions-su\
\pported}?
|              |  |     |        |  +--rw local-definition
|              |  |     |        |     +--rw algorithm
|              |  |     |        |     |       iasa:asymmetric-\
\algorithm-type
|              |  |     |        |     +--rw public-key-format
|              |  |     |        |     |       identityref
|              |  |     |        |     +--rw public-key
|              |  |     |        |     |       binary

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|              |  |     |        |     +--rw private-key-format?
|              |  |     |        |     |       identityref
|              |  |     |        |     +--rw (private-key-type)
|              |  |     |        |     |  +--:(private-key)
|              |  |     |        |     |  |  +--rw private-key?
|              |  |     |        |     |  |          binary
|              |  |     |        |     |  +--:(hidden-private-k\
\ey)
|              |  |     |        |     |  |  +--rw hidden-priva\
\te-key?
|              |  |     |        |     |  |          empty
|              |  |     |        |     |  +--:(encrypted-privat\
\e-key)
|              |  |     |        |     |     +--rw encrypted-pr\
\ivate-key
|              |  |     |        |     |        +--rw (key-type)
|              |  |     |        |     |        |  +--:(symmetr\
\ic-key-ref)
|              |  |     |        |     |        |  |  +--rw sym\
\metric-key-ref?    leafref
|              |  |     |        |     |        |  |          {\
\keystore-supported}?
|              |  |     |        |     |        |  +--:(asymmet\
\ric-key-ref)
|              |  |     |        |     |        |     +--rw asy\
\mmetric-key-ref?   leafref
|              |  |     |        |     |        |             {\
\keystore-supported}?
|              |  |     |        |     |        +--rw value?
|              |  |     |        |     |                binary
|              |  |     |        |     +--rw cert?
|              |  |     |        |     |       end-entity-cert-\
\cms
|              |  |     |        |     +---n certificate-expira\
\tion
|              |  |     |        |     |  +-- expiration-date
|              |  |     |        |     |          yang:date-and\
\-time
|              |  |     |        |     +---x generate-certifica\
\te-signing-request
|              |  |     |        |        +---w input
|              |  |     |        |        |  +---w subject
|              |  |     |        |        |  |       binary
|              |  |     |        |        |  +---w attributes?
|              |  |     |        |        |          binary
|              |  |     |        |        +--ro output
|              |  |     |        |           +--ro certificate-\
\signing-request

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|              |  |     |        |                   binary
|              |  |     |        +--:(keystore)
|              |  |     |                 {keystore-supported}?
|              |  |     |           +--rw keystore-reference
|              |  |     |              +--rw asymmetric-key?
|              |  |     |              |       ks:asymmetric-ke\
\y-ref
|              |  |     |              +--rw certificate?      \
\leafref
|              |  |     +--:(raw-private-key)
|              |  |     |        {raw-public-key-auth}?
|              |  |     |  +--rw raw-private-key
|              |  |     |     +--rw (local-or-keystore)
|              |  |     |        +--:(local)
|              |  |     |        |        {local-definitions-su\
\pported}?
|              |  |     |        |  +--rw local-definition
|              |  |     |        |     +--rw algorithm
|              |  |     |        |     |       iasa:asymmetric-\
\algorithm-type
|              |  |     |        |     +--rw public-key-format
|              |  |     |        |     |       identityref
|              |  |     |        |     +--rw public-key
|              |  |     |        |     |       binary
|              |  |     |        |     +--rw private-key-format?
|              |  |     |        |     |       identityref
|              |  |     |        |     +--rw (private-key-type)
|              |  |     |        |        +--:(private-key)
|              |  |     |        |        |  +--rw private-key?
|              |  |     |        |        |          binary
|              |  |     |        |        +--:(hidden-private-k\
\ey)
|              |  |     |        |        |  +--rw hidden-priva\
\te-key?
|              |  |     |        |        |          empty
|              |  |     |        |        +--:(encrypted-privat\
\e-key)
|              |  |     |        |           +--rw encrypted-pr\
\ivate-key
|              |  |     |        |              +--rw (key-type)
|              |  |     |        |              |  +--:(symmetr\
\ic-key-ref)
|              |  |     |        |              |  |  +--rw sym\
\metric-key-ref?    leafref
|              |  |     |        |              |  |          {\
\keystore-supported}?
|              |  |     |        |              |  +--:(asymmet\
\ric-key-ref)

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|              |  |     |        |              |     +--rw asy\
\mmetric-key-ref?   leafref
|              |  |     |        |              |             {\
\keystore-supported}?
|              |  |     |        |              +--rw value?
|              |  |     |        |                      binary
|              |  |     |        +--:(keystore)
|              |  |     |                 {keystore-supported}?
|              |  |     |           +--rw keystore-reference?
|              |  |     |                   ks:asymmetric-key-r\
\ef
|              |  |     +--:(psk) {psk-auth}?
|              |  |        +--rw psk
|              |  |           +--rw (local-or-keystore)
|              |  |              +--:(local)
|              |  |              |        {local-definitions-su\
\pported}?
|              |  |              |  +--rw local-definition
|              |  |              |     +--rw algorithm
|              |  |              |     |       isa:symmetric-al\
\gorithm-type
|              |  |              |     +--rw key-format?
|              |  |              |     |       identityref
|              |  |              |     +--rw (key-type)
|              |  |              |     |  +--:(key)
|              |  |              |     |  |  +--rw key?
|              |  |              |     |  |          binary
|              |  |              |     |  +--:(hidden-key)
|              |  |              |     |  |  +--rw hidden-key?
|              |  |              |     |  |          empty
|              |  |              |     |  +--:(encrypted-key)
|              |  |              |     |     +--rw encrypted-key
|              |  |              |     |        +--rw (key-type)
|              |  |              |     |        |  +--:(symmetr\
\ic-key-ref)
|              |  |              |     |        |  |  +--rw sym\
\metric-key-ref?    leafref
|              |  |              |     |        |  |          {\
\keystore-supported}?
|              |  |              |     |        |  +--:(asymmet\
\ric-key-ref)
|              |  |              |     |        |     +--rw asy\
\mmetric-key-ref?   leafref
|              |  |              |     |        |             {\
\keystore-supported}?
|              |  |              |     |        +--rw value?
|              |  |              |     |                binary
|              |  |              |     +--rw id?

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|              |  |              |             string
|              |  |              |             {ks:local-defini\
\tions-supported}?
|              |  |              +--:(keystore)
|              |  |                       {keystore-supported}?
|              |  |                 +--rw keystore-reference?
|              |  |                         ks:symmetric-key-ref
|              |  +--rw client-authentication!
|              |  |       {client-auth-config-supported}?
|              |  |  +--rw ca-certs! {x509-certificate-auth}?
|              |  |  |  +--rw (local-or-truststore)
|              |  |  |     +--:(local)
|              |  |  |     |        {local-definitions-supporte\
\d}?
|              |  |  |     |  +--rw local-definition
|              |  |  |     |     +--rw cert*
|              |  |  |     |     |       trust-anchor-cert-cms
|              |  |  |     |     +---n certificate-expiration
|              |  |  |     |        +-- expiration-date
|              |  |  |     |                yang:date-and-time
|              |  |  |     +--:(truststore)
|              |  |  |              {truststore-supported,x509-\
\certificates}?
|              |  |  |        +--rw truststore-reference?
|              |  |  |                ts:certificate-bag-ref
|              |  |  +--rw client-certs!
|              |  |  |       {x509-certificate-auth}?
|              |  |  |  +--rw (local-or-truststore)
|              |  |  |     +--:(local)
|              |  |  |     |        {local-definitions-supporte\
\d}?
|              |  |  |     |  +--rw local-definition
|              |  |  |     |     +--rw cert*
|              |  |  |     |     |       trust-anchor-cert-cms
|              |  |  |     |     +---n certificate-expiration
|              |  |  |     |        +-- expiration-date
|              |  |  |     |                yang:date-and-time
|              |  |  |     +--:(truststore)
|              |  |  |              {truststore-supported,x509-\
\certificates}?
|              |  |  |        +--rw truststore-reference?
|              |  |  |                ts:certificate-bag-ref
|              |  |  +--rw raw-public-keys!
|              |  |  |       {raw-public-key-auth}?
|              |  |  |  +--rw (local-or-truststore)
|              |  |  |     +--:(local)
|              |  |  |     |        {local-definitions-supporte\
\d}?

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|              |  |  |     |  +--rw local-definition
|              |  |  |     |     +--rw public-key* [name]
|              |  |  |     |        +--rw name
|              |  |  |     |        |       string
|              |  |  |     |        +--rw algorithm
|              |  |  |     |        |       iasa:asymmetric-alg\
\orithm-type
|              |  |  |     |        +--rw public-key-format
|              |  |  |     |        |       identityref
|              |  |  |     |        +--rw public-key
|              |  |  |     |                binary
|              |  |  |     +--:(truststore)
|              |  |  |              {truststore-supported,publi\
\c-keys}?
|              |  |  |        +--rw truststore-reference?
|              |  |  |                ts:public-key-bag-ref
|              |  |  +--rw psks! {psk-auth}?
|              |  +--rw hello-params
|              |  |       {tls-server-hello-params-config}?
|              |  |  +--rw tls-versions
|              |  |  |  +--rw tls-version*   identityref
|              |  |  +--rw cipher-suites
|              |  |     +--rw cipher-suite*   identityref
|              |  +--rw keepalives! {tls-server-keepalives}?
|              |     +--rw max-wait?       uint16
|              |     +--rw max-attempts?   uint8
|              +--rw netconf-server-parameters
|                 +--rw client-identity-mappings
|                         {tls-listen or tls-call-home or sshcm\
\n:ssh-x509-certs}?
|                    +--rw cert-to-name* [id]
|                       +--rw id             uint32
|                       +--rw fingerprint?
|                       |       x509c2n:tls-fingerprint
|                       +--rw map-type       identityref
|                       +--rw name           string
+--rw call-home! {ssh-call-home or tls-call-home}?
+--rw netconf-client* [name]
+--rw name                  string
+--rw endpoints
|  +--rw endpoint* [name]
|     +--rw name         string
|     +--rw (transport)
|        +--:(ssh) {ssh-call-home}?
|        |  +--rw ssh
|        |     +--rw tcp-client-parameters
|        |     |  +--rw remote-address    inet:host
|        |     |  +--rw remote-port?      inet:port-number

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|        |     |  |       {local-binding-supported}?
|        |     |  +--rw local-port?       inet:port-number
|        |     |  |       {local-binding-supported}?
|        |     |  +--rw keepalives!
|        |     |          {keepalives-supported}?
|        |     |     +--rw idle-time         uint16
|        |     |     +--rw max-probes        uint16
|        |     |     +--rw probe-interval    uint16
|        |     +--rw ssh-server-parameters
|        |     |  +--rw server-identity
|        |     |  |  +--rw host-key* [name]
|        |     |  |     +--rw name                 string
|        |     |  |     +--rw (host-key-type)
|        |     |  |        +--:(public-key)
|        |     |  |        |  +--rw public-key
|        |     |  |        |     +--rw (local-or-keystore)
|        |     |  |        |        +--:(local)
|        |     |  |        |        |        {local-defin\
\itions-supported}?
|        |     |  |        |        |  +--rw local-defini\
\tion
|        |     |  |        |        |     +--rw algorithm
|        |     |  |        |        |     |       iasa:as\
\ymmetric-algorithm-type
|        |     |  |        |        |     +--rw public-ke\
\y-format
|        |     |  |        |        |     |       identit\
\yref
|        |     |  |        |        |     +--rw public-key
|        |     |  |        |        |     |       binary
|        |     |  |        |        |     +--rw private-k\
\ey-format?
|        |     |  |        |        |     |       identit\
\yref
|        |     |  |        |        |     +--rw (private-\
\key-type)
|        |     |  |        |        |        +--:(private\
\-key)
|        |     |  |        |        |        |  +--rw pri\
\vate-key?
|        |     |  |        |        |        |          b\
\inary
|        |     |  |        |        |        +--:(hidden-\
\private-key)
|        |     |  |        |        |        |  +--rw hid\
\den-private-key?
|        |     |  |        |        |        |          e\

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\mpty
|        |     |  |        |        |        +--:(encrypt\
\ed-private-key)
|        |     |  |        |        |           +--rw enc\
\rypted-private-key
|        |     |  |        |        |              +--rw \
\(key-type)
|        |     |  |        |        |              |  +--\
\:(symmetric-key-ref)
|        |     |  |        |        |              |  |  \
\+--rw symmetric-key-ref?    leafref
|        |     |  |        |        |              |  |  \
\        {keystore-supported}?
|        |     |  |        |        |              |  +--\
\:(asymmetric-key-ref)
|        |     |  |        |        |              |     \
\+--rw asymmetric-key-ref?   leafref
|        |     |  |        |        |              |     \
\        {keystore-supported}?
|        |     |  |        |        |              +--rw \
\value?
|        |     |  |        |        |                    \
\  binary
|        |     |  |        |        +--:(keystore)
|        |     |  |        |                 {keystore-su\
\pported}?
|        |     |  |        |           +--rw keystore-ref\
\erence?
|        |     |  |        |                   ks:asymmet\
\ric-key-ref
|        |     |  |        +--:(certificate)
|        |     |  |           +--rw certificate
|        |     |  |                   {sshcmn:ssh-x509-ce\
\rts}?
|        |     |  |              +--rw (local-or-keystore)
|        |     |  |                 +--:(local)
|        |     |  |                 |        {local-defin\
\itions-supported}?
|        |     |  |                 |  +--rw local-defini\
\tion
|        |     |  |                 |     +--rw algorithm
|        |     |  |                 |     |       iasa:as\
\ymmetric-algorithm-type
|        |     |  |                 |     +--rw public-ke\
\y-format
|        |     |  |                 |     |       identit\
\yref
|        |     |  |                 |     +--rw public-key

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|        |     |  |                 |     |       binary
|        |     |  |                 |     +--rw private-k\
\ey-format?
|        |     |  |                 |     |       identit\
\yref
|        |     |  |                 |     +--rw (private-\
\key-type)
|        |     |  |                 |     |  +--:(private\
\-key)
|        |     |  |                 |     |  |  +--rw pri\
\vate-key?
|        |     |  |                 |     |  |          b\
\inary
|        |     |  |                 |     |  +--:(hidden-\
\private-key)
|        |     |  |                 |     |  |  +--rw hid\
\den-private-key?
|        |     |  |                 |     |  |          e\
\mpty
|        |     |  |                 |     |  +--:(encrypt\
\ed-private-key)
|        |     |  |                 |     |     +--rw enc\
\rypted-private-key
|        |     |  |                 |     |        +--rw \
\(key-type)
|        |     |  |                 |     |        |  +--\
\:(symmetric-key-ref)
|        |     |  |                 |     |        |  |  \
\+--rw symmetric-key-ref?    leafref
|        |     |  |                 |     |        |  |  \
\        {keystore-supported}?
|        |     |  |                 |     |        |  +--\
\:(asymmetric-key-ref)
|        |     |  |                 |     |        |     \
\+--rw asymmetric-key-ref?   leafref
|        |     |  |                 |     |        |     \
\        {keystore-supported}?
|        |     |  |                 |     |        +--rw \
\value?
|        |     |  |                 |     |              \
\  binary
|        |     |  |                 |     +--rw cert?
|        |     |  |                 |     |       end-ent\
\ity-cert-cms
|        |     |  |                 |     +---n certifica\
\te-expiration
|        |     |  |                 |     |  +-- expirati\
\on-date

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|        |     |  |                 |     |          yang\
\:date-and-time
|        |     |  |                 |     +---x generate-\
\certificate-signing-request
|        |     |  |                 |        +---w input
|        |     |  |                 |        |  +---w sub\
\ject
|        |     |  |                 |        |  |       b\
\inary
|        |     |  |                 |        |  +---w att\
\ributes?
|        |     |  |                 |        |          b\
\inary
|        |     |  |                 |        +--ro output
|        |     |  |                 |           +--ro cer\
\tificate-signing-request
|        |     |  |                 |                   b\
\inary
|        |     |  |                 +--:(keystore)
|        |     |  |                          {keystore-su\
\pported}?
|        |     |  |                    +--rw keystore-ref\
\erence
|        |     |  |                       +--rw asymmetri\
\c-key?
|        |     |  |                       |       ks:asym\
\metric-key-ref
|        |     |  |                       +--rw certifica\
\te?      leafref
|        |     |  +--rw client-authentication
|        |     |  |  +--rw supported-authentication-metho\
\ds
|        |     |  |  |  +--rw publickey?   empty
|        |     |  |  |  +--rw passsword?   empty
|        |     |  |  |  |       {client-auth-password}?
|        |     |  |  |  +--rw hostbased?   empty
|        |     |  |  |  |       {client-auth-hostbased}?
|        |     |  |  |  +--rw none?        empty
|        |     |  |  |          {client-auth-none}?
|        |     |  |  +--rw users
|        |     |  |  |       {client-auth-config-supporte\
\d}?
|        |     |  |  |  +--rw user* [name]
|        |     |  |  |     +--rw name           string
|        |     |  |  |     +--rw public-keys!
|        |     |  |  |     |  +--rw (local-or-truststore)
|        |     |  |  |     |     +--:(local)
|        |     |  |  |     |     |        {local-definiti\

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\ons-supported}?
|        |     |  |  |     |     |  +--rw local-definition
|        |     |  |  |     |     |     +--rw public-key*
|        |     |  |  |     |     |             [name]
|        |     |  |  |     |     |        +--rw name
|        |     |  |  |     |     |        |       string
|        |     |  |  |     |     |        +--rw algorithm
|        |     |  |  |     |     |        |       iasa:as\
\ymmetric-algorithm-type
|        |     |  |  |     |     |        +--rw public-ke\
\y-format
|        |     |  |  |     |     |        |       identit\
\yref
|        |     |  |  |     |     |        +--rw public-key
|        |     |  |  |     |     |                binary
|        |     |  |  |     |     +--:(truststore)
|        |     |  |  |     |              {truststore-sup\
\ported,public-keys}?
|        |     |  |  |     |        +--rw truststore-refe\
\rence?
|        |     |  |  |     |                ts:public-key\
\-bag-ref
|        |     |  |  |     +--rw password?
|        |     |  |  |     |       ianach:crypt-hash
|        |     |  |  |     |       {client-auth-password}?
|        |     |  |  |     +--rw hostbased!
|        |     |  |  |     |       {client-auth-hostbased\
\}?
|        |     |  |  |     |  +--rw (local-or-truststore)
|        |     |  |  |     |     +--:(local)
|        |     |  |  |     |     |        {local-definiti\
\ons-supported}?
|        |     |  |  |     |     |  +--rw local-definition
|        |     |  |  |     |     |     +--rw public-key*
|        |     |  |  |     |     |             [name]
|        |     |  |  |     |     |        +--rw name
|        |     |  |  |     |     |        |       string
|        |     |  |  |     |     |        +--rw algorithm
|        |     |  |  |     |     |        |       iasa:as\
\ymmetric-algorithm-type
|        |     |  |  |     |     |        +--rw public-ke\
\y-format
|        |     |  |  |     |     |        |       identit\
\yref
|        |     |  |  |     |     |        +--rw public-key
|        |     |  |  |     |     |                binary
|        |     |  |  |     |     +--:(truststore)
|        |     |  |  |     |              {truststore-sup\

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\ported,public-keys}?
|        |     |  |  |     |        +--rw truststore-refe\
\rence?
|        |     |  |  |     |                ts:public-key\
\-bag-ref
|        |     |  |  |     +--rw none?          empty
|        |     |  |  |             {client-auth-none}?
|        |     |  |  +--rw ca-certs!
|        |     |  |  |       {client-auth-config-supporte\
\d,sshcmn:ssh-x509-certs}?
|        |     |  |  |  +--rw (local-or-truststore)
|        |     |  |  |     +--:(local)
|        |     |  |  |     |        {local-definitions-su\
\pported}?
|        |     |  |  |     |  +--rw local-definition
|        |     |  |  |     |     +--rw cert*
|        |     |  |  |     |     |       trust-anchor-cer\
\t-cms
|        |     |  |  |     |     +---n certificate-expira\
\tion
|        |     |  |  |     |        +-- expiration-date
|        |     |  |  |     |                yang:date-and\
\-time
|        |     |  |  |     +--:(truststore)
|        |     |  |  |              {truststore-supported\
\,x509-certificates}?
|        |     |  |  |        +--rw truststore-reference?
|        |     |  |  |                ts:certificate-bag-\
\ref
|        |     |  |  +--rw client-certs!
|        |     |  |          {client-auth-config-supporte\
\d,sshcmn:ssh-x509-certs}?
|        |     |  |     +--rw (local-or-truststore)
|        |     |  |        +--:(local)
|        |     |  |        |        {local-definitions-su\
\pported}?
|        |     |  |        |  +--rw local-definition
|        |     |  |        |     +--rw cert*
|        |     |  |        |     |       trust-anchor-cer\
\t-cms
|        |     |  |        |     +---n certificate-expira\
\tion
|        |     |  |        |        +-- expiration-date
|        |     |  |        |                yang:date-and\
\-time
|        |     |  |        +--:(truststore)
|        |     |  |                 {truststore-supported\
\,x509-certificates}?

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|        |     |  |           +--rw truststore-reference?
|        |     |  |                   ts:certificate-bag-\
\ref
|        |     |  +--rw transport-params
|        |     |  |       {ssh-server-transport-params-co\
\nfig}?
|        |     |  |  +--rw host-key
|        |     |  |  |  +--rw host-key-alg*   identityref
|        |     |  |  +--rw key-exchange
|        |     |  |  |  +--rw key-exchange-alg*
|        |     |  |  |          identityref
|        |     |  |  +--rw encryption
|        |     |  |  |  +--rw encryption-alg*
|        |     |  |  |          identityref
|        |     |  |  +--rw mac
|        |     |  |     +--rw mac-alg*   identityref
|        |     |  +--rw keepalives!
|        |     |          {ssh-server-keepalives}?
|        |     |     +--rw max-wait?       uint16
|        |     |     +--rw max-attempts?   uint8
|        |     +--rw netconf-server-parameters
|        |        +--rw client-identity-mappings
|        |                {tls-listen or tls-call-home or\
\ sshcmn:ssh-x509-certs}?
|        |           +--rw cert-to-name* [id]
|        |              +--rw id             uint32
|        |              +--rw fingerprint?
|        |              |       x509c2n:tls-fingerprint
|        |              +--rw map-type       identityref
|        |              +--rw name           string
|        +--:(tls) {tls-call-home}?
|           +--rw tls
|              +--rw tcp-client-parameters
|              |  +--rw remote-port?      inet:port-number
|              |  |       {local-binding-supported}?
|              |  +--rw local-port?       inet:port-number
|              |  |       {local-binding-supported}?
|              |  +--rw keepalives!
|              |          {keepalives-supported}?
|              |     +--rw idle-time         uint16
|              |     +--rw max-probes        uint16
|              |     +--rw probe-interval    uint16
|              +--rw tls-server-parameters
|              |  +--rw server-identity
|              |  |  +--rw (auth-type)
|              |  |     +--:(certificate)

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|              |  |     |        {x509-certificate-auth}?
|              |  |     |  +--rw certificate
|              |  |     |     +--rw (local-or-keystore)
|              |  |     |        +--:(local)
|              |  |     |        |        {local-definiti\
\ons-supported}?
|              |  |     |        |  +--rw local-definition
|              |  |     |        |     +--rw algorithm
|              |  |     |        |     |       iasa:asymm\
\etric-algorithm-type
|              |  |     |        |     +--rw public-key-f\
\ormat
|              |  |     |        |     |       identityref
|              |  |     |        |     +--rw public-key
|              |  |     |        |     |       binary
|              |  |     |        |     +--rw private-key-\
\format?
|              |  |     |        |     |       identityref
|              |  |     |        |     +--rw (private-key\
\-type)
|              |  |     |        |     |  +--:(private-ke\
\y)
|              |  |     |        |     |  |  +--rw privat\
\e-key?
|              |  |     |        |     |  |          bina\
\ry
|              |  |     |        |     |  +--:(hidden-pri\
\vate-key)
|              |  |     |        |     |  |  +--rw hidden\
\-private-key?
|              |  |     |        |     |  |          empty
|              |  |     |        |     |  +--:(encrypted-\
\private-key)
|              |  |     |        |     |     +--rw encryp\
\ted-private-key
|              |  |     |        |     |        +--rw (ke\
\y-type)
|              |  |     |        |     |        |  +--:(s\
\ymmetric-key-ref)
|              |  |     |        |     |        |  |  +--\
\rw symmetric-key-ref?    leafref
|              |  |     |        |     |        |  |     \
\     {keystore-supported}?
|              |  |     |        |     |        |  +--:(a\
\symmetric-key-ref)
|              |  |     |        |     |        |     +--\
\rw asymmetric-key-ref?   leafref
|              |  |     |        |     |        |        \

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\     {keystore-supported}?
|              |  |     |        |     |        +--rw val\
\ue?
|              |  |     |        |     |                b\
\inary
|              |  |     |        |     +--rw cert?
|              |  |     |        |     |       end-entity\
\-cert-cms
|              |  |     |        |     +---n certificate-\
\expiration
|              |  |     |        |     |  +-- expiration-\
\date
|              |  |     |        |     |          yang:da\
\te-and-time
|              |  |     |        |     +---x generate-cer\
\tificate-signing-request
|              |  |     |        |        +---w input
|              |  |     |        |        |  +---w subject
|              |  |     |        |        |  |       bina\
\ry
|              |  |     |        |        |  +---w attrib\
\utes?
|              |  |     |        |        |          bina\
\ry
|              |  |     |        |        +--ro output
|              |  |     |        |           +--ro certif\
\icate-signing-request
|              |  |     |        |                   bina\
\ry
|              |  |     |        +--:(keystore)
|              |  |     |                 {keystore-suppo\
\rted}?
|              |  |     |           +--rw keystore-refere\
\nce
|              |  |     |              +--rw asymmetric-k\
\ey?
|              |  |     |              |       ks:asymmet\
\ric-key-ref
|              |  |     |              +--rw certificate?\
\      leafref
|              |  |     +--:(raw-private-key)
|              |  |     |        {raw-public-key-auth}?
|              |  |     |  +--rw raw-private-key
|              |  |     |     +--rw (local-or-keystore)
|              |  |     |        +--:(local)
|              |  |     |        |        {local-definiti\
\ons-supported}?
|              |  |     |        |  +--rw local-definition

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|              |  |     |        |     +--rw algorithm
|              |  |     |        |     |       iasa:asymm\
\etric-algorithm-type
|              |  |     |        |     +--rw public-key-f\
\ormat
|              |  |     |        |     |       identityref
|              |  |     |        |     +--rw public-key
|              |  |     |        |     |       binary
|              |  |     |        |     +--rw private-key-\
\format?
|              |  |     |        |     |       identityref
|              |  |     |        |     +--rw (private-key\
\-type)
|              |  |     |        |        +--:(private-ke\
\y)
|              |  |     |        |        |  +--rw privat\
\e-key?
|              |  |     |        |        |          bina\
\ry
|              |  |     |        |        +--:(hidden-pri\
\vate-key)
|              |  |     |        |        |  +--rw hidden\
\-private-key?
|              |  |     |        |        |          empty
|              |  |     |        |        +--:(encrypted-\
\private-key)
|              |  |     |        |           +--rw encryp\
\ted-private-key
|              |  |     |        |              +--rw (ke\
\y-type)
|              |  |     |        |              |  +--:(s\
\ymmetric-key-ref)
|              |  |     |        |              |  |  +--\
\rw symmetric-key-ref?    leafref
|              |  |     |        |              |  |     \
\     {keystore-supported}?
|              |  |     |        |              |  +--:(a\
\symmetric-key-ref)
|              |  |     |        |              |     +--\
\rw asymmetric-key-ref?   leafref
|              |  |     |        |              |        \
\     {keystore-supported}?
|              |  |     |        |              +--rw val\
\ue?
|              |  |     |        |                      b\
\inary
|              |  |     |        +--:(keystore)
|              |  |     |                 {keystore-suppo\

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\rted}?
|              |  |     |           +--rw keystore-refere\
\nce?
|              |  |     |                   ks:asymmetric\
\-key-ref
|              |  |     +--:(psk) {psk-auth}?
|              |  |        +--rw psk
|              |  |           +--rw (local-or-keystore)
|              |  |              +--:(local)
|              |  |              |        {local-definiti\
\ons-supported}?
|              |  |              |  +--rw local-definition
|              |  |              |     +--rw algorithm
|              |  |              |     |       isa:symmet\
\ric-algorithm-type
|              |  |              |     +--rw key-format?
|              |  |              |     |       identityref
|              |  |              |     +--rw (key-type)
|              |  |              |     |  +--:(key)
|              |  |              |     |  |  +--rw key?
|              |  |              |     |  |          bina\
\ry
|              |  |              |     |  +--:(hidden-key)
|              |  |              |     |  |  +--rw hidden\
\-key?
|              |  |              |     |  |          empty
|              |  |              |     |  +--:(encrypted-\
\key)
|              |  |              |     |     +--rw encryp\
\ted-key
|              |  |              |     |        +--rw (ke\
\y-type)
|              |  |              |     |        |  +--:(s\
\ymmetric-key-ref)
|              |  |              |     |        |  |  +--\
\rw symmetric-key-ref?    leafref
|              |  |              |     |        |  |     \
\     {keystore-supported}?
|              |  |              |     |        |  +--:(a\
\symmetric-key-ref)
|              |  |              |     |        |     +--\
\rw asymmetric-key-ref?   leafref
|              |  |              |     |        |        \
\     {keystore-supported}?
|              |  |              |     |        +--rw val\
\ue?
|              |  |              |     |                b\
\inary

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|              |  |              |     +--rw id?
|              |  |              |             string
|              |  |              |             {ks:local-\
\definitions-supported}?
|              |  |              +--:(keystore)
|              |  |                       {keystore-suppo\
\rted}?
|              |  |                 +--rw keystore-refere\
\nce?
|              |  |                         ks:symmetric-\
\key-ref
|              |  +--rw client-authentication!
|              |  |       {client-auth-config-supported}?
|              |  |  +--rw ca-certs!
|              |  |  |       {x509-certificate-auth}?
|              |  |  |  +--rw (local-or-truststore)
|              |  |  |     +--:(local)
|              |  |  |     |        {local-definitions-su\
\pported}?
|              |  |  |     |  +--rw local-definition
|              |  |  |     |     +--rw cert*
|              |  |  |     |     |       trust-anchor-cer\
\t-cms
|              |  |  |     |     +---n certificate-expira\
\tion
|              |  |  |     |        +-- expiration-date
|              |  |  |     |                yang:date-and\
\-time
|              |  |  |     +--:(truststore)
|              |  |  |              {truststore-supported\
\,x509-certificates}?
|              |  |  |        +--rw truststore-reference?
|              |  |  |                ts:certificate-bag-\
\ref
|              |  |  +--rw client-certs!
|              |  |  |       {x509-certificate-auth}?
|              |  |  |  +--rw (local-or-truststore)
|              |  |  |     +--:(local)
|              |  |  |     |        {local-definitions-su\
\pported}?
|              |  |  |     |  +--rw local-definition
|              |  |  |     |     +--rw cert*
|              |  |  |     |     |       trust-anchor-cer\
\t-cms
|              |  |  |     |     +---n certificate-expira\
\tion
|              |  |  |     |        +-- expiration-date
|              |  |  |     |                yang:date-and\

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\-time
|              |  |  |     +--:(truststore)
|              |  |  |              {truststore-supported\
\,x509-certificates}?
|              |  |  |        +--rw truststore-reference?
|              |  |  |                ts:certificate-bag-\
\ref
|              |  |  +--rw raw-public-keys!
|              |  |  |       {raw-public-key-auth}?
|              |  |  |  +--rw (local-or-truststore)
|              |  |  |     +--:(local)
|              |  |  |     |        {local-definitions-su\
\pported}?
|              |  |  |     |  +--rw local-definition
|              |  |  |     |     +--rw public-key* [name]
|              |  |  |     |        +--rw name
|              |  |  |     |        |       string
|              |  |  |     |        +--rw algorithm
|              |  |  |     |        |       iasa:asymmetr\
\ic-algorithm-type
|              |  |  |     |        +--rw public-key-form\
\at
|              |  |  |     |        |       identityref
|              |  |  |     |        +--rw public-key
|              |  |  |     |                binary
|              |  |  |     +--:(truststore)
|              |  |  |              {truststore-supported\
\,public-keys}?
|              |  |  |        +--rw truststore-reference?
|              |  |  |                ts:public-key-bag-r\
\ef
|              |  |  +--rw psks! {psk-auth}?
|              |  +--rw hello-params
|              |  |       {tls-server-hello-params-config\
\}?
|              |  |  +--rw tls-versions
|              |  |  |  +--rw tls-version*   identityref
|              |  |  +--rw cipher-suites
|              |  |     +--rw cipher-suite*   identityref
|              |  +--rw keepalives!
|              |          {tls-server-keepalives}?
|              |     +--rw max-wait?       uint16
|              |     +--rw max-attempts?   uint8
|              +--rw netconf-server-parameters
|                 +--rw client-identity-mappings
|                         {tls-listen or tls-call-home or\
\ sshcmn:ssh-x509-certs}?
|                    +--rw cert-to-name* [id]

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|                       +--rw id             uint32
|                       +--rw fingerprint?
|                       |       x509c2n:tls-fingerprint
|                       +--rw map-type       identityref
|                       +--rw name           string
+--rw connection-type
|  +--rw (connection-type)
|     +--:(persistent-connection)
|     |  +--rw persistent!
|     +--:(periodic-connection)
|        +--rw periodic!
|           +--rw period?         uint16
|           +--rw anchor-time?    yang:date-and-time
|           +--rw idle-timeout?   uint16
+--rw reconnect-strategy
+--rw start-with?     enumeration
+--rw max-attempts?   uint8

Appendix B.  Change Log

B.1.  00 to 01

o  Renamed "keychain" to "keystore".

B.2.  01 to 02

o  Added to ietf-netconf-client ability to connected to a cluster of
endpoints, including a reconnection-strategy.

o  Added to ietf-netconf-client the ability to configure connection-
type and also keep-alive strategy.

o  Updated both modules to accommodate new groupings in the ssh/tls
drafts.

B.3.  02 to 03

o  Refined use of tls-client-grouping to add a must statement
indicating that the TLS client must specify a client-certificate.

o  Changed 'netconf-client' to be a grouping (not a container).

B.4.  03 to 04

o  Added RFC 8174 to Requirements Language Section.

o  Replaced refine statement in ietf-netconf-client to add a
mandatory true.

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statement.

o  Now there are containers and groupings, for both the client and
server models.

B.5.  04 to 05

o  Now tree diagrams reference ietf-netmod-yang-tree-diagrams

o  Updated examples to inline key and certificates (no longer a
leafref to keystore)

B.6.  05 to 06

o  Fixed change log missing section issue.

o  Updated examples to match latest updates to the crypto-types,
trust-anchors, and keystore drafts.

o  Reduced line length of the YANG modules to fit within 69 columns.

B.7.  06 to 07

o  Removed "idle-timeout" from "persistent" connection config.

o  Added "random-selection" for reconnection-strategy's "starts-with"
enum.

o  Replaced "connection-type" choice default (persistent) with
"mandatory true".

o  Reduced the periodic-connection's "idle-timeout" from 5 to 2
minutes.

o  Replaced reconnect-timeout with period/anchor-time combo.

B.8.  07 to 08

o  Modified examples to be compatible with new crypto-types algs

B.9.  08 to 09

o  Corrected use of "mandatory true" for "address" leafs.

o  Updated examples to reflect update to groupings defined in the
keystore draft.

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o  Updated to use groupings defined in new TCP and HTTP drafts.

o  Updated copyright date, boilerplate template, affiliation, and
folding algorithm.

B.10.  09 to 10

o  Reformatted YANG modules.

B.11.  10 to 11

imported from other modules.

o  Added "must" expressions to ensure that keepalives are not
configured for "periodic" connections.

o  Updated the boilerplate text in module-level "description"
statement to match copyeditor convention.

o  Moved "expanded" tree diagrams to the Appendix.

B.12.  11 to 12

o  Removed the "Design Considerations" section.

o  Removed the 'must' statement limiting keepalives in periodic
connections.

o  Updated models and examples to reflect removal of the "demux"
containers in the imported models.

o  Updated the "periodic-connnection" description statements to be
more like the RESTCONF draft, especially where it described
dropping the underlying TCP connection.

o  Updated text to better reference where certain examples come from
(e.g., which Section in which draft).

o  In the server model, commented out the "must 'pinned-ca-certs or
pinned-client-certs'" statement to reflect change made in the TLS
draft whereby the trust anchors MAY be defined externally.

o  Replaced the 'listen', 'initiate', and 'call-home' features with
boolean expressions.

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B.13.  12 to 13

o  Updated to reflect changes in trust-anchors drafts (e.g., s/trust-
anchors/truststore/g + s/pinned.//)

B.14.  13 to 14

o  Adjusting from change in TLS client model (removing the top-level
'certificate' container), by swapping refining-in a 'mandatory
true' statement with a 'must' statement outside the 'uses'
statement.

o  Updated examples to reflect ietf-crypto-types change (e.g.,
identities --> enumerations)

B.15.  14 to 15

o  Refactored both the client and server modules similar to how the
ietf-restconf-server module was refactored in -13 of that draft,
and the ietf-restconf-client grouping.

B.16.  15 to 16

o  Added refinement to make "cert-to-name/fingerprint" be mandatory
false.

o  Commented out refinement to "tls-server-grouping/client-
authentication" until a better "must" expression is defined.

B.17.  16 to 17

o  Updated examples to include the "*-key-format" nodes.

o  Updated examples to remove the "required" nodes.

o  Updated examples to remove the "client-auth-defined-elsewhere"
nodes.

B.18.  17 to 18

o  Updated examples to reflect new "bag" addition to truststore.

Acknowledgements

The authors would like to thank for following for lively discussions
on list and in the halls (ordered by last name): Andy Bierman, Martin
Bjorklund, Benoit Claise, Ramkumar Dhanapal, Mehmet Ersue, Balazs

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Tom Petch, Juergen Schoenwaelder, Phil Shafer, Sean Turner, and Bert
Wijnen.

Kent Watsen
Watsen Networks

EMail: kent+ietf@watsen.net

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