Segment Routing over IPv6 (SRv6) Network Programming
RFC 8986
| Document | Type | RFC - Proposed Standard (February 2021; No errata) | |
|---|---|---|---|
| Authors | Clarence Filsfils , Pablo Camarillo , John Leddy , Daniel Voyer , Satoru Matsushima , Zhenbin Li | ||
| Last updated | 2021-02-22 | ||
| Replaces | draft-filsfils-spring-srv6-network-programming | ||
| Stream | IETF | ||
| Formats | plain text html xml pdf htmlized bibtex | ||
| Reviews | |||
| Stream | WG state | Submitted to IESG for Publication | |
| Document shepherd | Joel Halpern | ||
| Shepherd write-up | Show (last changed 2020-06-28) | ||
| IESG | IESG state | RFC 8986 (Proposed Standard) | |
| Action Holders |
(None)
|
||
| Consensus Boilerplate | Yes | ||
| Telechat date | |||
| Responsible AD | Martin Vigoureux | ||
| Send notices to | Bruno Decraene <bruno.decraene@orange.com>, Joel Halpern <jmh@joelhalpern.com> | ||
| IANA | IANA review state | Version Changed - Review Needed | |
| IANA action state | RFC-Ed-Ack | ||
Internet Engineering Task Force (IETF) C. Filsfils, Ed.
Request for Comments: 8986 P. Camarillo, Ed.
Category: Standards Track Cisco Systems, Inc.
ISSN: 2070-1721 J. Leddy
Akamai Technologies
D. Voyer
Bell Canada
S. Matsushima
SoftBank
Z. Li
Huawei Technologies
February 2021
Segment Routing over IPv6 (SRv6) Network Programming
Abstract
The Segment Routing over IPv6 (SRv6) Network Programming framework
enables a network operator or an application to specify a packet
processing program by encoding a sequence of instructions in the IPv6
packet header.
Each instruction is implemented on one or several nodes in the
network and identified by an SRv6 Segment Identifier in the packet.
This document defines the SRv6 Network Programming concept and
specifies the base set of SRv6 behaviors that enables the creation of
interoperable overlays with underlay optimization.
Status of This Memo
This is an Internet Standards Track document.
This document is a product of the Internet Engineering Task Force
(IETF). It represents the consensus of the IETF community. It has
received public review and has been approved for publication by the
Internet Engineering Steering Group (IESG). Further information on
Internet Standards is available in 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/rfc8986.
Copyright Notice
Copyright (c) 2021 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
2. Terminology
2.1. Requirements Language
3. SRv6 SID
3.1. SID Format
3.2. SID Allocation within an SR Domain
3.3. SID Reachability
4. SR Endpoint Behaviors
4.1. End: Endpoint
4.1.1. Upper-Layer Header
4.2. End.X: L3 Cross-Connect
4.3. End.T: Specific IPv6 Table Lookup
4.4. End.DX6: Decapsulation and IPv6 Cross-Connect
4.5. End.DX4: Decapsulation and IPv4 Cross-Connect
4.6. End.DT6: Decapsulation and Specific IPv6 Table Lookup
4.7. End.DT4: Decapsulation and Specific IPv4 Table Lookup
4.8. End.DT46: Decapsulation and Specific IP Table Lookup
4.9. End.DX2: Decapsulation and L2 Cross-Connect
4.10. End.DX2V: Decapsulation and VLAN L2 Table Lookup
4.11. End.DT2U: Decapsulation and Unicast MAC L2 Table Lookup
4.12. End.DT2M: Decapsulation and L2 Table Flooding
4.13. End.B6.Encaps: Endpoint Bound to an SRv6 Policy with
Encapsulation
4.14. End.B6.Encaps.Red: End.B6.Encaps with Reduced SRH
4.15. End.BM: Endpoint Bound to an SR-MPLS Policy
4.16. Flavors
4.16.1. PSP: Penultimate Segment Pop of the SRH
4.16.2. USP: Ultimate Segment Pop of the SRH
4.16.3. USD: Ultimate Segment Decapsulation
5. SR Policy Headend Behaviors
5.1. H.Encaps: SR Headend with Encapsulation in an SR Policy
5.2. H.Encaps.Red: H.Encaps with Reduced Encapsulation
5.3. H.Encaps.L2: H.Encaps Applied to Received L2 Frames
5.4. H.Encaps.L2.Red: H.Encaps.Red Applied to Received L2 Frames
6. Counters
7. Flow-Based Hash Computation
8. Control Plane
8.1. IGP
8.2. BGP-LS
8.3. BGP IP/VPN/EVPN
8.4. Summary
9. Security Considerations
10. IANA Considerations
10.1. Ethernet Next Header Type
10.2. SRv6 Endpoint Behaviors Registry
10.2.1. Registration Procedures
10.2.2. Initial Registrations
11. References
11.1. Normative References
11.2. Informative References
Acknowledgements
Contributors
Authors' Addresses
1. Introduction
Segment Routing [RFC8402] leverages the source routing paradigm. An
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