IPv6 Support for Segment Routing: SRv6+
draft-bonica-spring-srv6-plus-05

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Last updated 2019-08-28
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SPRING Working Group                                           R. Bonica
Internet-Draft                                                  S. Hegde
Intended status: Standards Track                        Juniper Networks
Expires: February 29, 2020                                     Y. Kamite
                                          NTT Communications Corporation
                                                               A. Alston
                                                            D. Henriques
                                                          Liquid Telecom
                                                              J. Halpern
                                                                Ericsson
                                                              J. Linkova
                                                                  Google
                                                                 G. Chen
                                                                   Baidu
                                                         August 28, 2019

                IPv6 Support for Segment Routing: SRv6+
                    draft-bonica-spring-srv6-plus-05

Abstract

   This document describes SRv6+. SRv6+ is a Segment Routing (SR)
   solution that leverages IPv6.  It supports a wide variety of use-
   cases while remaining in strict compliance with IPv6 specifications.
   SRv6+ is optimized for ASIC-based forwarding devices that operate at
   high data rates.

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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   This Internet-Draft will expire on February 29, 2020.

Bonica, et al.          Expires February 29, 2020               [Page 1]
Internet-Draft                    SRv6+                      August 2019

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Table of Contents

   1.  Overview  . . . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Requirements Language . . . . . . . . . . . . . . . . . . . .   4
   3.  Paths, Segments And Instructions  . . . . . . . . . . . . . .   5
   4.  Segment Types . . . . . . . . . . . . . . . . . . . . . . . .   6
     4.1.  Adjacency Segments  . . . . . . . . . . . . . . . . . . .   6
     4.2.  Node Segments . . . . . . . . . . . . . . . . . . . . . .   7
   5.  Segment Identifiers (SID) . . . . . . . . . . . . . . . . . .   7
     5.1.  Range . . . . . . . . . . . . . . . . . . . . . . . . . .   8
     5.2.  Assigning SIDs to Adjacency  Segments . . . . . . . . . .  10
     5.3.  Assigning SIDs to Node Segments . . . . . . . . . . . . .  10
   6.  Service Instructions  . . . . . . . . . . . . . . . . . . . .  10
     6.1.  Per-Segment . . . . . . . . . . . . . . . . . . . . . . .  10
     6.2.  Per-Path  . . . . . . . . . . . . . . . . . . . . . . . .  11
   7.  The IPv6 Data Plane . . . . . . . . . . . . . . . . . . . . .  11
     7.1.  The Routing Header  . . . . . . . . . . . . . . . . . . .  12
     7.2.  The Destination Options Header  . . . . . . . . . . . . .  13
   8.  Control Plane . . . . . . . . . . . . . . . . . . . . . . . .  14
   9.  Differences Between SRv6 and SRv6+  . . . . . . . . . . . . .  14
     9.1.  Routing Header Size . . . . . . . . . . . . . . . . . . .  14
     9.2.  Decoupling of Topological and Service Instructions  . . .  16
     9.3.  Authentication  . . . . . . . . . . . . . . . . . . . . .  16
     9.4.  Traffic Engineering Capability  . . . . . . . . . . . . .  17
     9.5.  IP Addressing Architecture  . . . . . . . . . . . . . . .  17
   10. Compliance  . . . . . . . . . . . . . . . . . . . . . . . . .  17
   11. Operational Considerations  . . . . . . . . . . . . . . . . .  18
     11.1.  Ping and Traceroute  . . . . . . . . . . . . . . . . . .  18
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