SR Replication Segment for Multi-point Service Delivery
draft-voyer-spring-sr-replication-segment-01

Document Type Active Internet-Draft (spring WG)
Last updated 2019-11-19
Replaces draft-voyer-spring-sr-p2mp-policy
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Network Working Group                                      D. Voyer, Ed.
Internet-Draft                                               Bell Canada
Intended status: Standards Track                             C. Filsfils
Expires: May 22, 2020                                          R. Parekh
                                                     Cisco Systems, Inc.
                                                              H. Bidgoli
                                                                   Nokia
                                                                Z. Zhang
                                                        Juniper Networks
                                                       November 19, 2019

        SR Replication Segment for Multi-point Service Delivery
              draft-voyer-spring-sr-replication-segment-01

Abstract

   This document describes the SR Replication segment for Multi-point
   service delivery.  A SR Replication segment allows a packet to be
   replicated from a Replication node to downstream nodes.

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
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   This Internet-Draft will expire on May 22, 2020.

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Copyright Notice

   Copyright (c) 2019 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.  Replication segment . . . . . . . . . . . . . . . . . . . . .   2
   3.  Use Cases . . . . . . . . . . . . . . . . . . . . . . . . . .   4
   4.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   4
   5.  Security Considerations . . . . . . . . . . . . . . . . . . .   4
   6.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   5
   7.  Contributors  . . . . . . . . . . . . . . . . . . . . . . . .   5
   8.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   6
     8.1.  Normative References  . . . . . . . . . . . . . . . . . .   6
     8.2.  Informative References  . . . . . . . . . . . . . . . . .   6
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   7

1.  Introduction

   We define a new type of segment for Segment Routing [RFC8402], called
   Replication segment, which allows a node (henceforth called as
   Replication node) to replicate packets to a set of other nodes
   (called Downstream nodes) in a Segment Routing Domain.  Replication
   segments provide building blocks for Point-to-Multi-point Service
   delivery.  A Replication segment at ingress node of Multi-point
   service could replicates packets directly to each egress node of the
   service (without need for any state on the internal routers), or it
   could be stitched to other Replication segments to build a tree in SR
   domain for Multi-point service.  The latter is outside the scope of
   this document but specified in [I-D.voyer-pim-sr-p2mp-policy].

2.  Replication segment

   In a Segment Routing Domain, a Replication segment is a logical
   segment which connects a Replication node to a set of Downstream
   nodes.  A Replication segment can be either provisioned locally on a

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   node or programmed by a PCE.  Replication segments apply equally to
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