NET-PGM extension: SRv6 uSID illustration
draft-filsfils-spring-net-pgm-srv6-usid-illus-00

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Last updated 2020-02-25
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SPRING                                                  C. Filsfils, Ed.
Internet-Draft                                         P. Camarillo, Ed.
Intended status: Informational                       Cisco Systems, Inc.
Expires: August 28, 2020                                          D. Cai
                                                                 Alibaba
                                                                D. Voyer
                                                             Bell Canada
                                                               I. Meilik
                                                                Broadcom
                                                                K. Patel
                                                            Arrcus, Inc.
                                                           W. Henderickx
                                                                   Nokia
                                                         P. Jonnalagadda
                                                       Barefoot Networks
                                                               D. Melman
                                                                 Marvell
                                                       February 25, 2020

               NET-PGM extension: SRv6 uSID illustration
            draft-filsfils-spring-net-pgm-srv6-usid-illus-00

Abstract

   This document illustrates the SRv6 "micro segment" (SRv6 uSID or uSID
   for short) instruction.

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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   Internet-Drafts are draft documents valid for a maximum of six months
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   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on August 28, 2020.

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Internet-Draft  NET-PGM extension: SRv6 uSID illustration  February 2020

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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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Illustration  . . . . . . . . . . . . . . . . . . . . . . . .   2
     2.1.  Reference diagram . . . . . . . . . . . . . . . . . . . .   3
     2.2.  SRv6 overlay with underlay optimization . . . . . . . . .   3
   3.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   4
   4.  Contributors  . . . . . . . . . . . . . . . . . . . . . . . .   5
   5.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   8
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   9

1.  Introduction

   SRv6 Network Programming [I-D.ietf-spring-srv6-network-programming]
   defines a mechanism to build a network program with topological and
   service segments.  It leverages the SRH
   [I-D.ietf-6man-segment-routing-header] to encode a network program
   together with optional metadata shared among the different SIDs.

   [I-D.filsfils-spring-net-pgm-extension-srv6-usid] draft extends SRv6
   Network Programming with a new type of SRv6 SID behavior: SRv6 uN.
   This document illustrates it.

2.  Illustration

   This section extends the illustrations for SRv6 Network Programming
   [I-D.filsfils-spring-srv6-net-pgm-illustration] to cover uSID.  The
   reference topology is the same with the addition of link 6-8.

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2.1.  Reference diagram

   Nodes 1 to 8 are considered within the network domain.

   Nodes X and Y are outside the domain.

   Nodes 1 and 8 act as PE respectively to nodes X and Y.

   All the links within the domain have the same IGP metric.  The IGP-
   metric shortest-path from 1 to 8 is 1-2-7-8 while the latency-metric
   shortest-path from 1 to 8 is 1-2-3-4-5-6-7-8.
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