NETCONF Call Home and RESTCONF Call Home
RFC 8071
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.
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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
For example, a network element is traditionally the TCP server.
However, when calling home, the network element initially assumes the
role of the TCP client. The network element's secure transport-layer
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