IS-IS Working Group S. Litkowski
Internet-Draft Orange
Intended status: Standards Track Y. Qu
Expires: September 11, 2019 Huawei
P. Sarkar
Individual
I. Chen
The MITRE Corporation
J. Tantsura
Individual
March 10, 2019
YANG Data Model for IS-IS Segment Routing
draft-ietf-isis-sr-yang-05
Abstract
This document defines a YANG data model that can be used to configure
and manage IS-IS Segment Routing.
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
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This Internet-Draft will expire on September 11, 2019.
Copyright Notice
Copyright (c) 2019 IETF Trust and the persons identified as the
document authors. All rights reserved.
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
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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.
Table of Contents
1. Overview . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Requirements Language . . . . . . . . . . . . . . . . . . . . 3
3. Tree Diagrams . . . . . . . . . . . . . . . . . . . . . . . . 3
4. IS-IS Segment Routing . . . . . . . . . . . . . . . . . . . . 3
5. IS-IS Segment Routing configuration . . . . . . . . . . . . . 6
5.1. Segment Routing activation . . . . . . . . . . . . . . . 6
5.2. Advertising mapping server policy . . . . . . . . . . . . 6
5.3. IP Fast reroute . . . . . . . . . . . . . . . . . . . . . 6
6. IS-IS Segment Routing YANG Module . . . . . . . . . . . . . . 6
7. Security Considerations . . . . . . . . . . . . . . . . . . . 20
8. Contributors . . . . . . . . . . . . . . . . . . . . . . . . 21
9. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 21
10. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 21
11. Change log for ietf-isis-sr YANG module . . . . . . . . . . . 21
11.1. From version -03 to version -04 . . . . . . . . . . . . 21
11.2. From version -02 to version -03 . . . . . . . . . . . . 21
11.3. From isis-sr document version -01 to version -02 . . . . 22
11.4. From isis-sr document version -00 to version -01 . . . . 22
11.5. From isis document version -12 to isis-sr document
version -00 . . . . . . . . . . . . . . . . . . . . . . 22
11.6. From isis document version -12 to version -13 . . . . . 22
11.7. From isis document version -09 to version -11 . . . . . 22
11.8. From isis document version -08 to version -09 . . . . . 22
11.9. From isis document version -07 to version -08 . . . . . 22
12. Normative References . . . . . . . . . . . . . . . . . . . . 22
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 24
1. Overview
YANG [RFC6020] [RFC7950] is a data definition language used to define
the contents of a conceptual data store that allows networked devices
to be managed using NETCONF [RFC6241]. YANG is proving relevant
beyond its initial confines, as bindings to other interfaces (e.g.,
ReST) and encodings other than XML (e.g., JSON) are being defined.
Furthermore, YANG data models can be used as the basis for
implementation of other interfaces, such as CLI and programmatic
APIs.
This document defines a YANG data model that can be used to configure
and manage IS-IS Segment Routing
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[I-D.ietf-isis-segment-routing-extensions] and it is an augmentation
to the IS-IS YANG data model.
The YANG modules in this document conform to the Network Management
Datastore Architecture (NMDA) [RFC8342].
2. Requirements Language
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. Tree Diagrams
This document uses the graphical representation of data models
defined in [RFC8340].
4. IS-IS Segment Routing
This document defines a model for IS-IS Segment Routing feature. It
is an augmentation of the IS-IS base model.
The IS-IS SR YANG module requires support for the base segment
routing module [I-D.ietf-spring-sr-yang], which defines the global
segment routing configuration independent of any specific routing
protocol configuration, and support of IS-IS base model
[I-D.ietf-isis-yang-isis-cfg] which defines basic IS-IS configuration
and state.
The figure below describes the overall structure of the isis-sr YANG
module:
module: ietf-isis-sr
augment /rt:routing/rt:control-plane-protocols
/rt:control-plane-protocol/isis:isis:
+--rw segment-routing
| +--rw enabled? boolean
| +--rw bindings
| +--rw advertise
| | +--rw policies* string
| +--rw receive? boolean
+--rw protocol-srgb {sr:protocol-srgb}?
+--rw srgb* [lower-bound upper-bound]
+--rw lower-bound uint32
+--rw upper-bound uint32
augment /rt:routing/rt:control-plane-protocols
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/rt:control-plane-protocol/isis:isis/isis:interfaces
/isis:interface:
+--rw segment-routing
+--rw adjacency-sid
+--rw advertise-adj-group-sid* [group-id]
| +--rw group-id uint32
+--rw advertise-protection? enumeration
augment /rt:routing/rt:control-plane-protocols
/rt:control-plane-protocol/isis:isis/isis:interfaces
/isis:interface/isis:fast-reroute:
+--rw ti-lfa {ti-lfa}?
+--rw enable? boolean
augment /rt:routing/rt:control-plane-protocols
/rt:control-plane-protocol/isis:isis/isis:interfaces
/isis:interface/isis:fast-reroute/isis:lfa/isis:remote-lfa:
+--rw use-segment-routing-path? boolean {remote-lfa-sr}?
augment /rt:routing/rt:control-plane-protocols
/rt:control-plane-protocol/isis:isis/isis:interfaces
/isis:interface/isis:adjacencies/isis:adjacency:
+--ro adjacency-sid* [value]
+--ro af? iana-rt-types:address-family
+--ro value uint32
+--ro weight? uint8
+--ro protection-requested? boolean
augment /rt:routing/rt:control-plane-protocols
/rt:control-plane-protocol/isis:isis/isis:database
/isis:level-db/isis:lsp/isis:router-capabilities:
+--ro sr-capability
| +--ro flags? bits
| +--ro global-blocks
| +--ro global-block*
| +--ro range-size? uint32
| +--ro sid-sub-tlv
| +--ro sid? uint32
+--ro sr-algorithms
| +--ro sr-algorithm* uint8
+--ro local-blocks
| +--ro local-block*
| +--ro range-size? uint32
| +--ro sid-sub-tlv
| +--ro sid? uint32
+--ro srms-preference
+--ro preference? uint8
augment /rt:routing/rt:control-plane-protocols
/rt:control-plane-protocol/isis:isis/isis:database
/isis:level-db/isis:lsp/isis:extended-is-neighbor
/isis:neighbor:
+--ro sid-list* [value]
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+--ro flags? bits
+--ro weight? uint8
+--ro neighbor-id? isis:system-id
+--ro value uint32
augment /rt:routing/rt:control-plane-protocols
/rt:control-plane-protocol/isis:isis/isis:database
/isis:level-db/isis:lsp/isis:mt-is-neighbor/isis:neighbor:
+--ro sid-list* [value]
+--ro flags? bits
+--ro weight? uint8
+--ro neighbor-id? isis:system-id
+--ro value uint32
augment /rt:routing/rt:control-plane-protocols
/rt:control-plane-protocol/isis:isis/isis:database
/isis:level-db/isis:lsp/isis:extended-ipv4-reachability
/isis:prefixes:
+--ro sid-list* [value]
+--ro flags? bits
+--ro algorithm? uint8
+--ro value uint32
augment /rt:routing/rt:control-plane-protocols
/rt:control-plane-protocol/isis:isis/isis:database
/isis:level-db/isis:lsp/isis:mt-extended-ipv4-reachability
/isis:prefixes:
+--ro sid-list* [value]
+--ro flags? bits
+--ro algorithm? uint8
+--ro value uint32
augment /rt:routing/rt:control-plane-protocols
/rt:control-plane-protocol/isis:isis/isis:database
/isis:level-db/isis:lsp/isis:ipv6-reachability/isis:prefixes:
+--ro sid-list* [value]
+--ro flags? bits
+--ro algorithm? uint8
+--ro value uint32
augment /rt:routing/rt:control-plane-protocols
/rt:control-plane-protocol/isis:isis/isis:database
/isis:level-db/isis:lsp/isis:mt-ipv6-reachability
/isis:prefixes:
+--ro sid-list* [value]
+--ro flags? bits
+--ro algorithm? uint8
+--ro value uint32
augment /rt:routing/rt:control-plane-protocols
/rt:control-plane-protocol/isis:isis/isis:database
/isis:level-db/isis:lsp:
+--ro segment-routing-bindings* [fec range]
+--ro fec string
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+--ro range uint16
+--ro flags? bits
+--ro binding
+--ro prefix-sid
+--ro sid-list* [value]
+--ro flags? bits
+--ro algorithm? uint8
+--ro value uint32
5. IS-IS Segment Routing configuration
5.1. Segment Routing activation
Activation of segment-routing IS-IS is done by setting the "enable"
leaf to true. This triggers advertisement of segment-routing
extensions based on the configuration parameters that have been setup
using the base segment routing module.
5.2. Advertising mapping server policy
The base segment routing module defines mapping server policies. By
default, IS-IS will not advertise nor receive any mapping server
entry. The IS-IS segment-routing module allows to advertise one or
multiple mapping server policies through the "bindings/advertise/
policies" leaf-list. The "bindings/receive" leaf allows to enable
the reception of mapping server entries.
5.3. IP Fast reroute
IS-IS SR model augments the fast-reroute container under interface.
It brings the ability to activate TI-LFA (topology independent LFA)
and also enhances remote LFA to use segment-routing tunneling instead
of LDP.
6. IS-IS Segment Routing YANG Module
<CODE BEGINS> file "ietf-isis-sr@2019-03-06.yang"
module ietf-isis-sr {
namespace "urn:ietf:params:xml:ns:"
+ "yang:ietf-isis-sr";
prefix isis-sr;
import ietf-routing {
prefix "rt";
}
import ietf-segment-routing-common {
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prefix "sr-cmn";
}
import ietf-segment-routing {
prefix "sr";
}
import ietf-isis {
prefix "isis";
}
import iana-routing-types {
prefix "iana-rt-types";
}
organization
"IETF LSR - LSR Working Group";
contact
"WG List: <mailto:lsr@ietf.org>
Editor: Stephane Litkowski
<mailto:stephane.litkowski@orange.com>
Author: Acee Lindem
<mailto:acee@cisco.com>
Author: Yingzhen Qu
<mailto:yingzhen.qu@huawei.com>
Author: Pushpasis Sarkar
<mailto:pushpasis.ietf@gmail.com>
Author: Ing-Wher Chen
<mailto:ingwherchen@mitre.org>
Author: Jeff Tantsura
<mailto:jefftant.ietf@gmail.com>
";
description
"The YANG module defines a generic configuration model for
Segment routing ISIS extensions common across all of the vendor
implementations.";
revision 2019-03-06 {
description
"Initial revision.";
reference "RFC XXXX";
}
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/* Identities */
/* Features */
feature remote-lfa-sr {
description
"Enhance rLFA to use SR path.";
}
feature ti-lfa {
description
"Enhance IPFRR with ti-lfa
support";
}
/* Groupings */
grouping sid-sub-tlv {
description "SID/Label sub-TLV grouping.";
container sid-sub-tlv {
description
"Used to advertise the SID/Label associated with a
prefix or adjacency.";
leaf sid {
type uint32;
description
"Segment Identifier (SID) - A 20 bit label or
32 bit SID.";
}
}
}
grouping sr-capability {
description
"SR capability grouping.";
container sr-capability {
description
"Segment Routing capability.";
leaf flags {
type bits {
bit mpls-ipv4 {
position 0;
description
"If set, then the router is capable of
processing SR MPLS encapsulated IPv4 packets
on all interfaces.";
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}
bit mpls-ipv6 {
position 1;
description
"If set, then the router is capable of
processing SR MPLS encapsulated IPv6 packets
on all interfaces.";
}
}
description
"Flags.";
}
container global-blocks {
description
"Segment Routing Global Blocks.";
list global-block {
description "Segment Routing Global Block.";
leaf range-size {
type uint32;
description "The SID range.";
}
uses sid-sub-tlv;
}
}
}
}
grouping sr-algorithm {
description
"SR algorithm grouping.";
container sr-algorithms {
description "All SR algorithms.";
leaf-list sr-algorithm {
type uint8;
description
"The Segment Routing (SR) algorithms that the router is
currently using.";
}
}
}
grouping srlb {
description
"SR Local Block grouping.";
container local-blocks {
description "List of SRLBs.";
list local-block {
description "Segment Routing Local Block.";
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leaf range-size {
type uint32;
description "The SID range.";
}
uses sid-sub-tlv;
}
}
}
grouping srms-preference {
description "The SRMS preference TLV is used to advertise
a preference associated with the node that acts
as an SR Mapping Server.";
container srms-preference {
description "SRMS Preference TLV.";
leaf preference {
type uint8 {
range "0 .. 255";
}
description "SRMS preference TLV, vlaue from 0 to 255.";
}
}
}
grouping adjacency-state {
description
"This group will extend adjacency state.";
list adjacency-sid {
key value;
config false;
leaf af {
type iana-rt-types:address-family;
description
"Address-family associated with the
segment ID";
}
leaf value {
type uint32;
description
"Value of the Adj-SID.";
}
leaf weight {
type uint8;
description
"Weight associated with
the adjacency SID.";
}
leaf protection-requested {
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type boolean;
description
"Describe if the adjacency SID
must be protected.";
}
description
"List of adjacency Segment IDs.";
}
}
grouping prefix-segment-id {
description
"This group defines segment routing extensions
for prefixes.";
list sid-list {
key value;
leaf flags {
type bits {
bit readvertisment {
position 7;
description
"If set, then the prefix to
which this Prefix-SID is attached,
has been propagated by the
router either from another level
or from redistribution.";
}
bit php {
position 5;
description
"If set, then the penultimate hop MUST NOT
pop the Prefix-SID before delivering the packet
to the node that advertised the Prefix-SID.";
}
bit explicit-null {
position 4;
description
"If set, any upstream neighbor of
the Prefix-SID originator MUST replace
the Prefix-SID with a
Prefix-SID having an
Explicit-NULL value (0 for IPv4 and 2 for
IPv6) before forwarding the packet.";
}
bit value {
position 3;
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description
"If set, then the Prefix-SID carries a
value (instead of an index).
By default the flag is UNSET.";
}
bit local {
position 2;
description
"If set, then the value/index carried by
the Prefix-SID has local significance.
By default the flag is UNSET.";
}
}
description
"Describes flags associated with the
segment ID.";
}
leaf algorithm {
type uint8;
description
"Algorithm to be used for path computation.";
}
leaf value {
type uint32;
description
"Value of the prefix-SID.";
}
description
"List of segments.";
}
}
grouping adjacency-segment-id {
description
"This group defines segment routing extensions
for adjacencies.";
list sid-list {
key value;
leaf flags {
type bits {
bit address-family {
position 7;
description
"If unset, then the Adj-SID refers
to an adjacency with outgoing IPv4 encapsulation.
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If set then the Adj-SID refers to an adjacency
with outgoing IPv6 encapsulation.";
}
bit backup {
position 6;
description
"If set, the Adj-SID refers to an
adjacency being protected
(e.g.: using IPFRR or MPLS-FRR)";
}
bit value {
position 5;
description
"If set, then the SID carries a
value (instead of an index).
By default the flag is SET.";
}
bit local {
position 4;
description
"If set, then the value/index carried by
the SID has local significance.
By default the flag is SET.";
}
bit set {
position 3;
description
"When set, the S-Flag indicates that the
Adj-SID refers to a set of adjacencies.";
}
bit persistent {
position 2;
description
"When set, the P-Flag indicates that the
Adj-SID is persistently allocated.";
}
}
description
"Describes flags associated with the
segment ID.";
}
leaf weight {
type uint8;
description
"The value represents the weight of the Adj-SID
for the purpose of load balancing.";
}
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leaf neighbor-id {
type isis:system-id;
description
"Describes the system ID of the neighbor
associated with the SID value. This is only
used on LAN adjacencies.";
}
leaf value {
type uint32;
description
"Value of the Adj-SID.";
}
description
"List of segments.";
}
}
grouping segment-routing-binding-tlv {
list segment-routing-bindings {
key "fec range";
leaf fec {
type string;
description
"IP (v4 or v6) range to be bound to SIDs.";
}
leaf range {
type uint16;
description
"Describes number of elements to assign
a binding to.";
}
leaf flags {
type bits {
bit address-family {
position 7;
description
"If unset, then the Prefix FEC
carries an IPv4 Prefix.
If set then the Prefix FEC carries an
IPv6 Prefix.";
}
bit mirror {
position 6;
description
"Set if the advertised SID/path
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corresponds to a mirrored context.";
}
bit flooding {
position 5;
description
"If the S bit is set(1),
the IS-IS Router CAPABILITY TLV
MUST be flooded across the entire routing domain.
If the S bit is
not set(0), the TLV MUST NOT be leaked between levels.
This bit MUST NOT be altered during the TLV leaking.";
}
bit down {
position 4;
description
"When the IS-IS Router CAPABILITY TLV is
leaked from level-2 to level-1, the D bit
MUST be set. Otherwise, this bit MUST
be clear. IS-IS Router capability TLVs
with the D bit set MUST NOT
be leaked from level-1 to level-2.
This is to prevent TLV looping.";
}
bit attached {
position 3;
description
"The originator of the SID/Label Binding TLV MAY set the
A bit in order to signal that the prefixes and SIDs
advertised in the SID/Label Binding TLV are directly
connected to their originators.";
}
}
description
"Flags of the binding.";
}
container binding {
container prefix-sid {
uses prefix-segment-id;
description
"Binding prefix SID to the range.";
}
description
"Bindings associated with the range.";
}
description
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"This container describes list of SID/Label bindings.
ISIS reference is TLV 149.";
}
description
"Defines binding TLV for database.";
}
/* Cfg */
augment "/rt:routing/" +
"rt:control-plane-protocols/rt:control-plane-protocol"+
"/isis:isis" {
when "/rt:routing/rt:control-plane-protocols/"+
"rt:control-plane-protocol/rt:type = 'isis:isis'" {
description
"This augment ISIS routing protocol when used";
}
description
"This augments ISIS protocol configuration
with segment routing.";
uses sr:sr-controlplane;
container protocol-srgb {
if-feature sr:protocol-srgb;
uses sr-cmn:srgb;
description
"Per-protocol SRGB.";
}
}
augment "/rt:routing/" +
"rt:control-plane-protocols/rt:control-plane-protocol"+
"/isis:isis/isis:interfaces/isis:interface" {
when "/rt:routing/rt:control-plane-protocols/"+
"rt:control-plane-protocol/rt:type = 'isis:isis'" {
description
"This augment ISIS routing protocol when used";
}
description
"This augments ISIS protocol configuration
with segment routing.";
uses sr:igp-interface;
}
augment "/rt:routing/" +
"rt:control-plane-protocols/rt:control-plane-protocol"+
"/isis:isis/isis:interfaces/isis:interface"+
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"/isis:fast-reroute" {
when "/rt:routing/rt:control-plane-protocols/"+
"rt:control-plane-protocol/rt:type = 'isis:isis'" {
description
"This augment ISIS routing protocol when used";
}
description
"This augments ISIS IP FRR with TILFA.";
container ti-lfa {
if-feature ti-lfa;
leaf enable {
type boolean;
description
"Enables TI-LFA computation.";
}
description
"TILFA configuration.";
}
}
augment "/rt:routing/" +
"rt:control-plane-protocols/rt:control-plane-protocol"+
"/isis:isis/isis:interfaces/isis:interface"+
"/isis:fast-reroute/isis:lfa/isis:remote-lfa" {
when "/rt:routing/rt:control-plane-protocols/"+
"rt:control-plane-protocol/rt:type = 'isis:isis'" {
description
"This augment ISIS routing protocol when used";
}
description
"This augments ISIS remoteLFA config with
use of segment-routing path.";
leaf use-segment-routing-path {
if-feature remote-lfa-sr;
type boolean;
description
"force remote LFA to use segment routing
path instead of LDP path.";
}
}
/* Operational states */
augment "/rt:routing/" +
"rt:control-plane-protocols/rt:control-plane-protocol"+
"/isis:isis/isis:interfaces/isis:interface" +
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"/isis:adjacencies/isis:adjacency" {
when "/rt:routing/rt:control-plane-protocols/"+
"rt:control-plane-protocol/rt:type = 'isis:isis'" {
description
"This augment ISIS routing protocol when used";
}
description
"This augments ISIS protocol configuration
with segment routing.";
uses adjacency-state;
}
augment "/rt:routing/" +
"rt:control-plane-protocols/rt:control-plane-protocol"+
"/isis:isis/isis:database/isis:level-db/isis:lsp"+
"/isis:router-capabilities" {
when "/rt:routing/rt:control-plane-protocols/"+
"rt:control-plane-protocol/rt:type = 'isis:isis'" {
description
"This augment ISIS routing protocol when used";
}
description
"This augments ISIS protocol LSDB router capability.";
uses sr-capability;
uses sr-algorithm;
uses srlb;
uses srms-preference;
}
augment "/rt:routing/" +
"rt:control-plane-protocols/rt:control-plane-protocol"+
"/isis:isis/isis:database/isis:level-db/isis:lsp"+
"/isis:extended-is-neighbor/isis:neighbor" {
when "/rt:routing/rt:control-plane-protocols/"+
"rt:control-plane-protocol/rt:type = 'isis:isis'" {
description
"This augment ISIS routing protocol when used";
}
description
"This augments ISIS protocol LSDB neighbor.";
uses adjacency-segment-id;
}
augment "/rt:routing/" +
"rt:control-plane-protocols/rt:control-plane-protocol"+
"/isis:isis/isis:database/isis:level-db/isis:lsp"+
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"/isis:mt-is-neighbor/isis:neighbor" {
when "/rt:routing/rt:control-plane-protocols/"+
"rt:control-plane-protocol/rt:type = 'isis:isis'" {
description
"This augment ISIS routing protocol when used";
}
description
"This augments ISIS protocol LSDB neighbor.";
uses adjacency-segment-id;
}
augment "/rt:routing/" +
"rt:control-plane-protocols/rt:control-plane-protocol"+
"/isis:isis/isis:database/isis:level-db/isis:lsp"+
"/isis:extended-ipv4-reachability/isis:prefixes" {
when "/rt:routing/rt:control-plane-protocols/"+
"rt:control-plane-protocol/rt:type = 'isis:isis'" {
description
"This augment ISIS routing protocol when used";
}
description
"This augments ISIS protocol LSDB prefix.";
uses prefix-segment-id;
}
augment "/rt:routing/" +
"rt:control-plane-protocols/rt:control-plane-protocol"+
"/isis:isis/isis:database/isis:level-db/isis:lsp"+
"/isis:mt-extended-ipv4-reachability/isis:prefixes" {
when "/rt:routing/rt:control-plane-protocols/"+
"rt:control-plane-protocol/rt:type = 'isis:isis'" {
description
"This augment ISIS routing protocol when used";
}
description
"This augments ISIS protocol LSDB prefix.";
uses prefix-segment-id;
}
augment "/rt:routing/" +
"rt:control-plane-protocols/rt:control-plane-protocol"+
"/isis:isis/isis:database/isis:level-db/isis:lsp"+
"/isis:ipv6-reachability/isis:prefixes" {
when "/rt:routing/rt:control-plane-protocols/"+
"rt:control-plane-protocol/rt:type = 'isis:isis'" {
description
"This augment ISIS routing protocol when used";
}
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description
"This augments ISIS protocol LSDB prefix.";
uses prefix-segment-id;
}
augment "/rt:routing/" +
"rt:control-plane-protocols/rt:control-plane-protocol"+
"/isis:isis/isis:database/isis:level-db/isis:lsp"+
"/isis:mt-ipv6-reachability/isis:prefixes" {
when "/rt:routing/rt:control-plane-protocols/"+
"rt:control-plane-protocol/rt:type = 'isis:isis'" {
description
"This augment ISIS routing protocol when used";
}
description
"This augments ISIS protocol LSDB prefix.";
uses prefix-segment-id;
}
augment "/rt:routing/" +
"rt:control-plane-protocols/rt:control-plane-protocol"+
"/isis:isis/isis:database/isis:level-db/isis:lsp" {
when "/rt:routing/rt:control-plane-protocols/"+
"rt:control-plane-protocol/rt:type = 'isis:isis'" {
description
"This augment ISIS routing protocol when used";
}
description
"This augments ISIS protocol LSDB.";
uses segment-routing-binding-tlv;
}
/* Notifications */
}
<CODE ENDS>
7. Security Considerations
Configuration and state data defined in this document are designed to
be accessed via the NETCONF protocol [RFC6241].
As IS-IS is an IGP protocol (critical piece of the network), ensuring
stability and security of the protocol is mandatory for the network
service.
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Authors recommends to implement NETCONF access control model
([RFC6536]) to restrict access to all or part of the configuration to
specific users.
8. Contributors
Authors would like to thank Derek Yeung, Acee Lindem, Yi Yang for
their major contributions to the draft.
9. Acknowledgements
Author affiliation with The MITRE Corporation is provided for
identification purposes only, and is not intended to convey or imply
MITRE's concurrence with, or support for, the positions, opinions or
viewpoints expressed. MITRE has approved this document for Public
Release, Distribution Unlimited, with Public Release Case Number
18-3281.
10. IANA Considerations
The IANA is requested to assign two new URIs from the IETF XML
registry ([RFC3688]). Authors are suggesting the following URI:
URI: urn:ietf:params:xml:ns:yang:ietf-isis-sr
Registrant Contact: IS-IS WG
XML: N/A, the requested URI is an XML namespace
This document also requests one new YANG module name in the YANG
Module Names registry ([RFC6020]) with the following suggestion :
name: ietf-isis-sr
namespace: urn:ietf:params:xml:ns:yang:ietf-isis-sr
prefix: isis-sr
reference: RFC XXXX
11. Change log for ietf-isis-sr YANG module
11.1. From version -03 to version -04
o Fixed yang module indentations.
11.2. From version -02 to version -03
o Change address-family type according to routing types.
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11.3. From isis-sr document version -01 to version -02
o NMDA compliancy.
o Added SRLB in configuration and LSDB.
o Added SR capability in LSDB.
o Added SR algorithms in LSDB.
o Added SRMS preference in LSDB.
o Alignment with iana-rt-types module.
o Align binding SID with draft-ietf-isis-segment-routing-extensions-
13.
11.4. From isis-sr document version -00 to version -01
o Added P-Flag in Adj-SID.
11.5. From isis document version -12 to isis-sr document version -00
o Separate document for IS-IS SR extensions.
11.6. From isis document version -12 to version -13
o Align with new segment routing common module.
11.7. From isis document version -09 to version -11
o Fixed XPATH in 'when' expressions.
11.8. From isis document version -08 to version -09
o Align to draft-ietf-netmod-routing-cfg-23.
11.9. From isis document version -07 to version -08
o Align to draft-ietf-netmod-routing-cfg-21.
12. Normative References
[I-D.ietf-isis-segment-routing-extensions]
Previdi, S., Ginsberg, L., Filsfils, C., Bashandy, A.,
Gredler, H., Litkowski, S., Decraene, B., and J. Tantsura,
"IS-IS Extensions for Segment Routing", draft-ietf-isis-
segment-routing-extensions-22 (work in progress).
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[I-D.ietf-isis-yang-isis-cfg]
Litkowski, S., Yeung, D., Lindem, A., Zhang, Z., and L.
Lhotka, "YANG Data Model for IS-IS Protocol", draft-ietf-
isis-yang-isis-cfg-35 (work in progress), March 2019.
[I-D.ietf-spring-sr-yang]
Litkowski, S., Qu, Y., Sarkar, P., and J. Tantsura, "YANG
Data Model for Segment Routing", draft-ietf-spring-sr-
yang-08 (work in progress), December 2017.
[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>.
[RFC3688] Mealling, M., "The IETF XML Registry", BCP 81, RFC 3688,
DOI 10.17487/RFC3688, January 2004,
<https://www.rfc-editor.org/info/rfc3688>.
[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>.
[RFC6536] Bierman, A. and M. Bjorklund, "Network Configuration
Protocol (NETCONF) Access Control Model", RFC 6536,
DOI 10.17487/RFC6536, March 2012,
<https://www.rfc-editor.org/info/rfc6536>.
[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>.
[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>.
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[RFC8342] Bjorklund, M., Schoenwaelder, J., Shafer, P., Watsen, K.,
and R. Wilton, "Network Management Datastore Architecture
(NMDA)", RFC 8342, DOI 10.17487/RFC8342, March 2018,
<https://www.rfc-editor.org/info/rfc8342>.
Authors' Addresses
Stephane Litkowski
Orange
Email: stephane.litkowski@orange.com
Yinghzen Qu
Huawei
Email: yingzhen.qu@huawei.com
Pushpasis Sarkar
Individual
Email: pushpasis.ietf@gmail.com
Ing-Wher Chen
The MITRE Corporation
Email: ingwherchen@mitre.org
Jeff Tantsura
Individual
Email: jefftant.ietf@gmail.com
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