Using an Autonomic Control Plane for Stable Connectivity of Network Operations, Administration, and Maintenance (OAM)
RFC 8368

Document Type RFC - Informational (May 2018; No errata)
Last updated 2018-05-09
Replaces draft-eckert-anima-stable-connectivity
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Stream WG state Submitted to IESG for Publication
Document shepherd Sheng Jiang
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IESG IESG state RFC 8368 (Informational)
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Responsible AD Terry Manderson
Send notices to "Sheng Jiang" <jiangsheng@huawei.com>
IANA IANA review state Version Changed - Review Needed
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Internet Engineering Task Force (IETF)                    T. Eckert, Ed.
Request for Comments: 8368                                        Huawei
Category: Informational                                     M. Behringer
ISSN: 2070-1721                                                 May 2018

      Using an Autonomic Control Plane for Stable Connectivity of
       Network Operations, Administration, and Maintenance (OAM)

Abstract

   Operations, Administration, and Maintenance (OAM), as per BCP 161,
   for data networks is often subject to the problem of circular
   dependencies when relying on connectivity provided by the network to
   be managed for the OAM purposes.

   Provisioning while bringing up devices and networks tends to be more
   difficult to automate than service provisioning later on.  Changes in
   core network functions impacting reachability cannot be automated
   because of ongoing connectivity requirements for the OAM equipment
   itself, and widely used OAM protocols are not secure enough to be
   carried across the network without security concerns.

   This document describes how to integrate OAM processes with an
   autonomic control plane in order to provide stable and secure
   connectivity for those OAM processes.  This connectivity is not
   subject to the aforementioned circular dependencies.

Status of This Memo

   This document is not an Internet Standards Track specification; it is
   published for informational purposes.

   This document is a product of the Internet Engineering Task Force
   (IETF).  It has been approved for publication by the Internet
   Engineering Steering Group (IESG).  Not all documents approved by the
   IESG are candidates for any level of Internet Standard; see 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
   https://www.rfc-editor.org/info/rfc8368.

Eckert & Behringer            Informational                     [Page 1]
RFC 8368               AN Stable Connectivity OAM               May 2018

Copyright Notice

   Copyright (c) 2018 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
   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.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  Self-Dependent OAM Connectivity . . . . . . . . . . . . .   3
     1.2.  Data Communication Networks (DCNs)  . . . . . . . . . . .   3
     1.3.  Leveraging a Generalized Autonomic Control Plane  . . . .   4
   2.  GACP Requirements . . . . . . . . . . . . . . . . . . . . . .   5
   3.  Solutions . . . . . . . . . . . . . . . . . . . . . . . . . .   6
     3.1.  Stable Connectivity for Centralized OAM . . . . . . . . .   6
       3.1.1.  Simple Connectivity for Non-GACP-Capable
               NMS Hosts . . . . . . . . . . . . . . . . . . . . . .   7
       3.1.2.  Challenges and Limitations of Simple Connectivity . .   8
       3.1.3.  Simultaneous GACP and Data-Plane Connectivity . . . .   9
       3.1.4.  IPv4-Only NMS Hosts . . . . . . . . . . . . . . . . .  10
       3.1.5.  Path Selection Policies . . . . . . . . . . . . . . .  12
       3.1.6.  Autonomic NOC Device/Applications . . . . . . . . . .  16
       3.1.7.  Encryption of Data-Plane Connections  . . . . . . . .  16
       3.1.8.  Long-Term Direction of the Solution . . . . . . . . .  17
     3.2.  Stable Connectivity for Distributed       Network/OAM . .  18
   4.  Architectural Considerations  . . . . . . . . . . . . . . . .  18
     4.1.  No IPv4 for GACP  . . . . . . . . . . . . . . . . . . . .  18
   5.  Security Considerations . . . . . . . . . . . . . . . . . . .  19
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  20
   7.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  21
     7.1.  Normative References  . . . . . . . . . . . . . . . . . .  21
     7.2.  Informative References  . . . . . . . . . . . . . . . . .  22
   Acknowledgements  . . . . . . . . . . . . . . . . . . . . . . . .  23
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  24

Eckert & Behringer            Informational                     [Page 2]
RFC 8368               AN Stable Connectivity OAM               May 2018

1.  Introduction

1.1.  Self-Dependent OAM Connectivity

   Operations, Administration, and Maintenance (OAM), as per BCP 161
   [RFC6291], for data networks is often subject to the problem of
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