Service Programming with Segment Routing
draft-xuclad-spring-sr-service-programming-01

Document Type Active Internet-Draft (individual)
Last updated 2018-10-22
Replaces draft-xuclad-spring-sr-service-chaining
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SPRING                                                      F. Clad, Ed.
Internet-Draft                                       Cisco Systems, Inc.
Intended status: Standards Track                              X. Xu, Ed.
Expires: April 25, 2019                                          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 22, 2018

                Service Programming with Segment Routing
             draft-xuclad-spring-sr-service-programming-01

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.

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   This Internet-Draft will expire on April 25, 2019.

Clad, et al.             Expires April 25, 2019                 [Page 1]
Internet-Draft  Service Programming with Segment Routing    October 2018

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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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