SR Replication Segment for Multi-point Service Delivery
draft-ietf-spring-sr-replication-segment-03

Document Type Active Internet-Draft (spring WG)
Authors Daniel Voyer  , Clarence Filsfils  , Rishabh Parekh  , Hooman Bidgoli  , Zhaohui Zhang 
Last updated 2020-10-29
Replaces draft-voyer-spring-sr-replication-segment
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Network Working Group                                      D. Voyer, Ed.
Internet-Draft                                               Bell Canada
Intended status: Standards Track                             C. Filsfils
Expires: May 2, 2021                                           R. Parekh
                                                     Cisco Systems, Inc.
                                                              H. Bidgoli
                                                                   Nokia
                                                                Z. Zhang
                                                        Juniper Networks
                                                        October 29, 2020

        SR Replication Segment for Multi-point Service Delivery
              draft-ietf-spring-sr-replication-segment-03

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
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
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   This Internet-Draft will expire on May 2, 2021.

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Copyright Notice

   Copyright (c) 2020 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 . . . . . . . . . . . . . . . . . . . . .   3
   3.  Use Cases . . . . . . . . . . . . . . . . . . . . . . . . . .   4
   4.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   5
   5.  Security Considerations . . . . . . . . . . . . . . . . . . .   5
   6.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   5
   7.  Contributors  . . . . . . . . . . . . . . . . . . . . . . . .   5
   8.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   6
     8.1.  Normative References  . . . . . . . . . . . . . . . . . .   6
     8.2.  Informative References  . . . . . . . . . . . . . . . . .   7
   Appendix A.  Illustration of a Replication Segment  . . . . . . .   7
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   9

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-Multipoint Service
   delivery via SR Point-to-Multipoint (SR P2MP) policy.  A Replication
   segment can replicate packet to directly connected nodes or to
   downstream nodes (without need for state on the transit routers).
   This document focuses on the Replication Segment building block.  The
   use of one or more stitched Replication Segments constructed for SR
   P2MP Policy tree is specified in [I-D.voyer-pim-sr-p2mp-policy].

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2.  Replication Segment

   In a Segment Routing Domain, a Replication segment is a logical
   construct which connects a Replication Node to a set of Downstream
   Nodes.  A Replication segment is a local segment instantiated at a
   Replication node.  It can be either provisioned locally on a node or
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