Service Programming with Segment Routing
draft-ietf-spring-sr-service-programming-00

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Last updated 2019-10-14
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SPRING                                                      F. Clad, Ed.
Internet-Draft                                       Cisco Systems, Inc.
Intended status: Standards Track                              X. Xu, Ed.
Expires: April 16, 2020                                          Alibaba
                                                             C. Filsfils
                                                     Cisco Systems, Inc.
                                                              D. Bernier
                                                             Bell Canada
                                                                   C. Li
                                                                  Huawei
                                                             B. Decraene
                                                                  Orange
                                                                   S. Ma
                                                                 Juniper
                                                           C. Yadlapalli
                                                                    AT&T
                                                           W. Henderickx
                                                                   Nokia
                                                              S. Salsano
                                        Universita di Roma "Tor Vergata"
                                                        October 14, 2019

                Service Programming with Segment Routing
              draft-ietf-spring-sr-service-programming-00

Abstract

   This document defines data plane functionality required to implement
   service segments and achieve service programming in SR-enabled MPLS
   and IP networks, as described in the Segment Routing architecture.

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 April 16, 2020.

Clad, et al.             Expires April 16, 2020                 [Page 1]
Internet-Draft  Service Programming with Segment Routing    October 2019

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  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   4
   3.  Classification and steering . . . . . . . . . . . . . . . . .   4
   4.  Service segments  . . . . . . . . . . . . . . . . . . . . . .   5
     4.1.  SR-aware services . . . . . . . . . . . . . . . . . . . .   5
     4.2.  SR-unaware services . . . . . . . . . . . . . . . . . . .   6
   5.  SR service policies . . . . . . . . . . . . . . . . . . . . .   7
     5.1.  SR-MPLS data plane  . . . . . . . . . . . . . . . . . . .   8
     5.2.  SRv6 data plane . . . . . . . . . . . . . . . . . . . . .  10
   6.  SR proxy behaviors  . . . . . . . . . . . . . . . . . . . . .  11
     6.1.  Static SR proxy . . . . . . . . . . . . . . . . . . . . .  14
       6.1.1.  SR-MPLS pseudocode  . . . . . . . . . . . . . . . . .  16
       6.1.2.  SRv6 pseudocode . . . . . . . . . . . . . . . . . . .  17
     6.2.  Dynamic SR proxy  . . . . . . . . . . . . . . . . . . . .  19
       6.2.1.  SR-MPLS pseudocode  . . . . . . . . . . . . . . . . .  19
       6.2.2.  SRv6 pseudocode . . . . . . . . . . . . . . . . . . .  20
     6.3.  Shared memory SR proxy  . . . . . . . . . . . . . . . . .  21
     6.4.  Masquerading SR proxy . . . . . . . . . . . . . . . . . .  21
       6.4.1.  SRv6 masquerading proxy pseudocode  . . . . . . . . .  22
       6.4.2.  Variant 1: Destination NAT  . . . . . . . . . . . . .  23
       6.4.3.  Variant 2: Caching  . . . . . . . . . . . . . . . . .  23
   7.  Metadata  . . . . . . . . . . . . . . . . . . . . . . . . . .  23
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