Active OAM for Service Function Chains in Networks
draft-ietf-sfc-multi-layer-oam-00
SFC WG G. Mirsky
Internet-Draft ZTE Corp.
Updates: 8300 (if approved) W. Meng
Intended status: Standards Track ZTE Corporation
Expires: May 8, 2019 B. Khasnabish
ZTE TX, Inc.
C. Wang
November 4, 2018
Active OAM for Service Function Chains in Networks
draft-ietf-sfc-multi-layer-oam-00
Abstract
A set of requirements for active Operation, Administration and
Maintenance (OAM) of Service Function Chains (SFCs) in networks is
presented. Based on these requirements an encapsulation of active
OAM message in SFC and a mechanism to detect and localize defects
described. Also, this document updates RFC 8300 in the definition of
O (OAM) bit in the Network Service Header (NSH) and defines how the
active OAM message identified in SFC NSH.
Status of This Memo
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provisions of BCP 78 and BCP 79.
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material or to cite them other than as "work in progress."
This Internet-Draft will expire on May 8, 2019.
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This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents
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Mirsky, et al. Expires May 8, 2019 [Page 1]
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Conventions . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.1. Requirements Language . . . . . . . . . . . . . . . . . . 3
2.2. Terminology . . . . . . . . . . . . . . . . . . . . . . . 3
3. Requirements for Active OAM in SFC Network . . . . . . . . . 4
4. Active OAM Identification in SFC NSH . . . . . . . . . . . . 5
5. Echo Request/Echo Reply for SFC in Networks . . . . . . . . . 7
5.1. SFC Echo Request Transmission . . . . . . . . . . . . . . 8
5.2. SFC Echo Request Reception . . . . . . . . . . . . . . . 8
5.3. SFC Echo Reply Transmission . . . . . . . . . . . . . . . 8
5.4. Overlay Echo Reply Reception . . . . . . . . . . . . . . 9
6. Security Considerations . . . . . . . . . . . . . . . . . . . 9
7. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 10
8. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 10
8.1. SFC Active OAM Protocol . . . . . . . . . . . . . . . . . 10
8.2. SFC Active OAM Message Type . . . . . . . . . . . . . . . 10
8.3. SFC Echo Request/Echo Reply Parameters . . . . . . . . . 11
8.4. SFC Echo Request/Echo Reply Message Types . . . . . . . . 11
8.5. SFC Echo Reply Modes . . . . . . . . . . . . . . . . . . 12
8.6. SFC TLV Type . . . . . . . . . . . . . . . . . . . . . . 12
8.7. SFC OAM UDP Port . . . . . . . . . . . . . . . . . . . . 13
9. References . . . . . . . . . . . . . . . . . . . . . . . . . 13
9.1. Normative References . . . . . . . . . . . . . . . . . . 14
9.2. Informative References . . . . . . . . . . . . . . . . . 14
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 15
1. Introduction
[RFC7665] defines components necessary to implement Service Function
Chain (SFC). These include a classifier which performs the
classification of incoming packets. A Service Function Forwarder
(SFF) is responsible for forwarding traffic to one or more connected
Service Functions (SFs) according to the information carried in the
SFC encapsulation. SFF also handles traffic coming back from the SF
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