Stateless SRv6 Point-to-Multipoint Path
draft-chen-pim-srv6-p2mp-path-02

Document Type Active Internet-Draft (individual)
Authors Huaimo Chen  , Mike McBride  , Yanhe Fan  , Mehmet Toy  , Aijun Wang  , Lei Liu  , Xufeng Liu 
Last updated 2021-02-21
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Network Working Group                                            H. Chen
Internet-Draft                                                M. McBride
Intended status: Experimental                                  Futurewei
Expires: August 25, 2021                                          Y. Fan
                                                            Casa Systems
                                                                  M. Toy
                                                                 Verizon
                                                                 A. Wang
                                                           China Telecom
                                                                  L. Liu
                                                                 Fujitsu
                                                                  X. Liu
                                                          Volta Networks
                                                       February 21, 2021

                Stateless SRv6 Point-to-Multipoint Path
                    draft-chen-pim-srv6-p2mp-path-02

Abstract

   This document describes a solution for a SRv6 Point-to-Multipoint
   (P2MP) Path/Tree to deliver the traffic from the ingress of the path
   to the multiple egresses/leaves of the path in a SR domain.  There is
   no state stored in the core of the network for a SR P2MP path like a
   SR Point-to-Point (P2P) path in this solution.

Requirements Language

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in RFC 2119 [RFC2119].

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
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Chen, et al.             Expires August 25, 2021                [Page 1]
Internet-Draft             Stateless SRv6 P2MP             February 2021

   This Internet-Draft will expire on August 25, 2021.

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
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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Overview of P2MP Multicast Tree . . . . . . . . . . . . . . .   3
   3.  Encoding P2MP Multicast Tree  . . . . . . . . . . . . . . . .   5
   4.  Procedures/Behaviors  . . . . . . . . . . . . . . . . . . . .   7
     4.1.  Procedure/Behavior on Ingress Node  . . . . . . . . . . .   7
     4.2.  Procedure/Behavior on Transit Node  . . . . . . . . . . .   8
     4.3.  Procedure/Behavior on Egress Node . . . . . . . . . . . .  10
   5.  Stateless SRv6 P2MP Path for Ingress  . . . . . . . . . . . .  10
   6.  Protection  . . . . . . . . . . . . . . . . . . . . . . . . .  12
     6.1.  Global Protection . . . . . . . . . . . . . . . . . . . .  12
     6.2.  Local Protection  . . . . . . . . . . . . . . . . . . . .  12
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  12
   8.  Security Considerations . . . . . . . . . . . . . . . . . . .  13
   9.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  13
   10. References  . . . . . . . . . . . . . . . . . . . . . . . . .  13
     10.1.  Normative References . . . . . . . . . . . . . . . . . .  13
     10.2.  Informative References . . . . . . . . . . . . . . . . .  14
   Appendix A.  Example IPv6 Header using G-SRv6 . . . . . . . . . .  14
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  15

1.  Introduction

   The Segment Routing (SR) for unicast or Point-to-Point (P2P) path is
   described in [RFC8402].  For SR multicast or Point-to-Multipoint
   (P2MP) path/tree, it may be implemented through using multiple SR P2P
   paths.  The function of a SR P2MP path/tree from an ingress node to
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