Operations, Administration, and Maintenance (OAM) in Segment Routing Networks with IPv6 Data plane (SRv6)
draft-ietf-6man-spring-srv6-oam-08
6man Z. Ali
Internet-Draft C. Filsfils
Intended status: Standards Track Cisco Systems
Expires: May 3, 2021 S. Matsushima
Softbank
D. Voyer
Bell Canada
M. Chen
Huawei
October 30, 2020
Operations, Administration, and Maintenance (OAM) in Segment Routing
Networks with IPv6 Data plane (SRv6)
draft-ietf-6man-spring-srv6-oam-08
Abstract
This document describes how the existing IPv6 mechanisms for ping and
traceroute can be used in an SRv6 network. The document also
specifies the OAM flag in the Segment Routing Header (SRH) for
performing controllable and predictable flow sampling from segment
endpoints. In addition, the document describes how a centralized
monitoring system performs a path continuity check between any nodes
within an SRv6 domain.
Status of This Memo
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This Internet-Draft will expire on May 3, 2021.
Copyright Notice
Copyright (c) 2020 IETF Trust and the persons identified as the
document authors. All rights reserved.
Ali, et al. Expires May 3, 2021 [Page 1]
Internet-Draft SRv6 OAM October 2020
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1. Requirements Language . . . . . . . . . . . . . . . . . . 3
1.2. Abbreviations . . . . . . . . . . . . . . . . . . . . . . 3
1.3. Terminology and Reference Topology . . . . . . . . . . . 3
2. OAM Mechanisms . . . . . . . . . . . . . . . . . . . . . . . 5
2.1. O-flag in Segment Routing Header . . . . . . . . . . . . 5
2.1.1. O-flag Processing . . . . . . . . . . . . . . . . . . 6
2.2. OAM Operations . . . . . . . . . . . . . . . . . . . . . 7
3. Illustrations . . . . . . . . . . . . . . . . . . . . . . . . 8
3.1. Ping in SRv6 Networks . . . . . . . . . . . . . . . . . . 8
3.1.1. Classic Ping . . . . . . . . . . . . . . . . . . . . 8
3.1.2. Pinging a SID . . . . . . . . . . . . . . . . . . . . 10
3.2. Traceroute . . . . . . . . . . . . . . . . . . . . . . . 10
3.2.1. Classic Traceroute . . . . . . . . . . . . . . . . . 11
3.2.2. Traceroute to a SID . . . . . . . . . . . . . . . . . 12
3.3. A Hybrid OAM Using O-flag . . . . . . . . . . . . . . . . 14
3.4. Monitoring of SRv6 Paths . . . . . . . . . . . . . . . . 16
4. Implementation Status . . . . . . . . . . . . . . . . . . . . 18
5. Security Considerations . . . . . . . . . . . . . . . . . . . 18
6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 18
7. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 18
8. Contributors . . . . . . . . . . . . . . . . . . . . . . . . 18
9. References . . . . . . . . . . . . . . . . . . . . . . . . . 20
9.1. Normative References . . . . . . . . . . . . . . . . . . 20
9.2. Informative References . . . . . . . . . . . . . . . . . 20
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 22
1. Introduction
As Segment Routing with IPv6 data plane (SRv6) [RFC8402] simply adds
a new type of Routing Extension Header, existing IPv6 OAM mechanisms
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