OSPFv3 Extensions for SRv6
draft-ietf-lsr-ospfv3-srv6-extensions-01
Link State Routing Z. Li
Internet-Draft Z. Hu
Intended status: Standards Track D. Cheng
Expires: February 15, 2021 Huawei Technologies
K. Talaulikar, Ed.
P. Psenak
Cisco Systems
August 14, 2020
OSPFv3 Extensions for SRv6
draft-ietf-lsr-ospfv3-srv6-extensions-01
Abstract
Segment Routing (SR) allows for a flexible definition of end-to-end
paths by encoding paths as sequences of topological sub-paths, called
"segments". Segment Routing architecture can be implemented over an
MPLS data plane as well as an IPv6 data plane. This draft describes
the OSPFv3 extensions required to support Segment Routing over an
IPv6 data plane (SRv6).
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1. Requirements Language . . . . . . . . . . . . . . . . . . 3
2. SRv6 Capabilities TLV . . . . . . . . . . . . . . . . . . . . 3
3. Advertisement of Supported Algorithms . . . . . . . . . . . . 5
4. Advertisement of SRH Operation Limits . . . . . . . . . . . . 5
4.1. Maximum Segments Left MSD Type . . . . . . . . . . . . . 5
4.2. Maximum End Pop MSD Type . . . . . . . . . . . . . . . . 5
4.3. Maximum H.Encaps MSD Type . . . . . . . . . . . . . . . . 5
4.4. Maximum End D MSD Type . . . . . . . . . . . . . . . . . 6
5. Advertisement of SRv6 Locator and End SIDs . . . . . . . . . 6
6. SRv6 Locator LSA . . . . . . . . . . . . . . . . . . . . . . 7
6.1. SRv6 Locator TLV . . . . . . . . . . . . . . . . . . . . 9
7. Advertisment of SRv6 End SIDs . . . . . . . . . . . . . . . . 11
8. Advertisment of SRv6 SIDs Associated with Adjacencies . . . . 12
8.1. SRv6 End.X SID Sub-TLV . . . . . . . . . . . . . . . . . 13
8.2. SRv6 LAN End.X SID Sub-TLV . . . . . . . . . . . . . . . 15
9. SRv6 SID Structure Sub-TLV . . . . . . . . . . . . . . . . . 16
10. Advertising Endpoint Behaviors . . . . . . . . . . . . . . . 17
11. Security Considerations . . . . . . . . . . . . . . . . . . . 18
12. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 19
12.1. OSPF Router Information TLVs . . . . . . . . . . . . . . 19
12.2. OSPFv3 LSA Function Codes . . . . . . . . . . . . . . . 19
12.3. OSPFv3 Extended-LSA Sub-TLVs . . . . . . . . . . . . . . 19
12.4. OSPFv3 Locator LSA TLVs . . . . . . . . . . . . . . . . 19
12.5. OSPFv3 Locator LSA Sub-TLVs . . . . . . . . . . . . . . 20
13. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 20
14. References . . . . . . . . . . . . . . . . . . . . . . . . . 21
14.1. Normative References . . . . . . . . . . . . . . . . . . 21
14.2. Informative References . . . . . . . . . . . . . . . . . 22
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 23
1. Introduction
Segment Routing (SR) architecture [RFC8402] specifies how a node can
steer a packet through an ordered list of instructions, called
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