NETCONF Call Home and RESTCONF Call Home
RFC 8071

Document Type RFC - Proposed Standard (February 2017; No errata)
Last updated 2017-02-22
Replaces draft-ietf-netconf-reverse-ssh
Stream IETF
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Stream WG state Submitted to IESG for Publication
Document shepherd Mahesh Jethanandani
Shepherd write-up Show (last changed 2015-09-18)
IESG IESG state RFC 8071 (Proposed Standard)
Consensus Boilerplate Yes
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Responsible AD Benoit Claise
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IANA IANA review state Version Changed - Review Needed
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Internet Engineering Task Force (IETF)                         K. Watsen
Request for Comments: 8071                              Juniper Networks
Category: Standards Track                                  February 2017
ISSN: 2070-1721

                NETCONF Call Home and RESTCONF Call Home

Abstract

   This RFC presents NETCONF Call Home and RESTCONF Call Home, which
   enable a NETCONF or RESTCONF server to initiate a secure connection
   to a NETCONF or RESTCONF client, respectively.

Status of This Memo

   This is an Internet Standards Track document.

   This document is a product of the Internet Engineering Task Force
   (IETF).  It represents the consensus of the IETF community.  It has
   received public review and has been approved for publication by the
   Internet Engineering Steering Group (IESG).  Further information on
   Internet Standards is available in Section 2 of RFC 7841.

   Information about the current status of this document, any errata,
   and how to provide feedback on it may be obtained at
   http://www.rfc-editor.org/info/rfc8071.

Copyright Notice

   Copyright (c) 2017 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
   (http://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.

Watsen                       Standards Track                    [Page 1]
RFC 8071        NETCONF Call Home and RESTCONF Call Home   February 2017

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Motivation  . . . . . . . . . . . . . . . . . . . . . . .   3
     1.2.  Requirements Terminology  . . . . . . . . . . . . . . . .   3
     1.3.  Applicability Statement . . . . . . . . . . . . . . . . .   4
     1.4.  Relation to RFC 4253  . . . . . . . . . . . . . . . . . .   4
     1.5.  The NETCONF/RESTCONF Convention . . . . . . . . . . . . .   4
   2.  Solution Overview . . . . . . . . . . . . . . . . . . . . . .   5
   3.  The NETCONF or RESTCONF Client  . . . . . . . . . . . . . . .   5
     3.1.  Client Protocol Operation . . . . . . . . . . . . . . . .   5
     3.2.  Client Configuration Data Model . . . . . . . . . . . . .   7
   4.  The NETCONF or RESTCONF Server  . . . . . . . . . . . . . . .   7
     4.1.  Server Protocol Operation . . . . . . . . . . . . . . . .   7
     4.2.  Server Configuration Data Model . . . . . . . . . . . . .   8
   5.  Security Considerations . . . . . . . . . . . . . . . . . . .   9
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  10
   7.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  11
     7.1.  Normative References  . . . . . . . . . . . . . . . . . .  11
     7.2.  Informative References  . . . . . . . . . . . . . . . . .  12
   Acknowledgements  . . . . . . . . . . . . . . . . . . . . . . . .  13
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .  13

1.  Introduction

   This RFC presents NETCONF Call Home and RESTCONF Call Home, which
   enable a NETCONF or RESTCONF server to initiate a secure connection
   to a NETCONF or RESTCONF client, respectively.

   NETCONF Call Home supports both of the secure transports used by the
   Network Configuration Protocol (NETCONF) [RFC6241], Secure Shell
   (SSH), and Transport Layer Security (TLS).  The NETCONF protocol's
   binding to SSH is defined in [RFC6242].  The NETCONF protocol's
   binding to TLS is defined in [RFC7589].

   RESTCONF Call Home only supports TLS, the same as the RESTCONF
   protocol [RFC8040].  The RESTCONF protocol's binding to TLS is
   defined in [RFC8040].

   The SSH protocol is defined in [RFC4253].  The TLS protocol is
   defined in [RFC5246].  Both the SSH and TLS protocols are layered on
   top of the TCP protocol, which is defined in [RFC793].

   Both NETCONF Call Home and RESTCONF Call Home preserve all but one of
   the client/server roles in their respective protocol stacks, as
   compared to client-initiated NETCONF and RESTCONF connections.  The
   one and only role reversal that occurs is at the TCP layer; that is,
   which peer is the TCP client and which is the TCP server.

Watsen                       Standards Track                    [Page 2]
RFC 8071        NETCONF Call Home and RESTCONF Call Home   February 2017
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