Active OAM for Service Function Chaining
draft-ietf-sfc-multi-layer-oam-09
SFC WG G. Mirsky
Internet-Draft ZTE Corp.
Updates: 8300 (if approved) W. Meng
Intended status: Standards Track ZTE Corporation
Expires: August 15, 2021 B. Khasnabish
C. Wang
Individual contributor
February 11, 2021
Active OAM for Service Function Chaining
draft-ietf-sfc-multi-layer-oam-09
Abstract
A set of requirements for active Operation, Administration, and
Maintenance (OAM) of Service Function Chains (SFCs) in a network is
presented in this document. Based on these requirements, an
encapsulation of active OAM messages in SFC and a mechanism to detect
and localize defects are described.
This document updates RFC 8300 in the definition of O (OAM) bit in
the Network Service Header (NSH) and defines how an active OAM
message is identified in the NSH.
Status of This Memo
This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79.
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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 August 15, 2021.
Copyright Notice
Copyright (c) 2021 IETF Trust and the persons identified as the
document authors. All rights reserved.
Mirsky, et al. Expires August 15, 2021 [Page 1]
Internet-Draft Active OAM for SFC February 2021
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Terminology and Conventions . . . . . . . . . . . . . . . . . 3
2.1. Requirements Language . . . . . . . . . . . . . . . . . . 3
2.2. Acronyms . . . . . . . . . . . . . . . . . . . . . . . . 4
3. Requirements for Active OAM in SFC Network . . . . . . . . . 4
4. Active OAM Identification in SFC NSH . . . . . . . . . . . . 6
5. Echo Request/Echo Reply for SFC . . . . . . . . . . . . . . . 8
5.1. Return Codes . . . . . . . . . . . . . . . . . . . . . . 10
5.2. Authentication in Echo Request/Reply . . . . . . . . . . 11
5.3. SFC Echo Request Transmission . . . . . . . . . . . . . . 11
5.4. SFC Echo Request Reception . . . . . . . . . . . . . . . 12
5.4.1. Errored TLVs TLV . . . . . . . . . . . . . . . . . . 12
5.5. SFC Echo Reply Transmission . . . . . . . . . . . . . . . 13
5.6. SFC Echo Reply Reception . . . . . . . . . . . . . . . . 14
6. Security Considerations . . . . . . . . . . . . . . . . . . . 14
7. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 15
8. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 15
8.1. SFC Active OAM Protocol . . . . . . . . . . . . . . . . . 15
8.2. SFC Active OAM Message Type . . . . . . . . . . . . . . . 15
8.3. SFC Echo Request/Echo Reply Parameters . . . . . . . . . 16
8.4. SFC Echo Request/Echo Reply Message Types . . . . . . . . 16
8.5. SFC Echo Reply Modes . . . . . . . . . . . . . . . . . . 17
8.6. SFC Echo Return Codes . . . . . . . . . . . . . . . . . . 18
8.7. SFC TLV Type . . . . . . . . . . . . . . . . . . . . . . 19
8.8. SFC OAM UDP Port . . . . . . . . . . . . . . . . . . . . 20
9. References . . . . . . . . . . . . . . . . . . . . . . . . . 20
9.1. Normative References . . . . . . . . . . . . . . . . . . 20
9.2. Informative References . . . . . . . . . . . . . . . . . 20
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 21
1. Introduction
[RFC7665] defines components necessary to implement a Service
Function Chain (SFC). These include:
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