Network Programming extension: SRv6 uSID instruction
draft-filsfils-spring-net-pgm-extension-srv6-usid-08

Document Type Active Internet-Draft (individual)
Authors Clarence Filsfils  , Pablo Camarillo  , Dezhong Cai  , Daniel Voyer  , Israel Meilik  , Keyur Patel  , Wim Henderickx  , Prem Jonnalagadda  , David Melman  , Yisong Liu  , Jim Guichard 
Last updated 2020-11-02
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SPRING                                                  C. Filsfils, Ed.
Internet-Draft                                         P. Camarillo, Ed.
Intended status: Standards Track                     Cisco Systems, Inc.
Expires: May 6, 2021                                              D. Cai
                                                                 Alibaba
                                                                D. Voyer
                                                             Bell Canada
                                                               I. Meilik
                                                                Broadcom
                                                                K. Patel
                                                            Arrcus, Inc.
                                                           W. Henderickx
                                                                   Nokia
                                                         P. Jonnalagadda
                                                       Barefoot Networks
                                                               D. Melman
                                                                 Marvell
                                                                  Y. Liu
                                                            China Mobile
                                                             J. Guichard
                                                               Futurewei
                                                        November 2, 2020

          Network Programming extension: SRv6 uSID instruction
          draft-filsfils-spring-net-pgm-extension-srv6-usid-08

Abstract

   The SRv6 "micro segment" (SRv6 uSID or uSID for short) instruction is
   a straightforward extension of the SRv6 Network Programming model:

   o  The SRv6 Control Plane is leveraged without any change

   o  The SRH dataplane encapsulation is leveraged without any change

   o  Any SID in the SID list can carry micro segments

   o  Based on the Compressed SRv6 Segment List Encoding in SRH
      [I-D.filsfilscheng-spring-srv6-srh-comp-sl-enc] framework

   This enables:

   o  ultra-scale (e.g. multi-domain 5G deployments)

   o  minimum MTU overhead

   o  installed-base reuse

Filsfils, et al.           Expires May 6, 2021                  [Page 1]
Internet-Draft       NET-PGM: SRv6 uSID instruction        November 2020

Requirements Language

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
   "OPTIONAL" in this document are to be interpreted as described in BCP
   14 [RFC2119] [RFC8174] when, and only when, they appear in all
   capitals, as shown here.

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
   Task Force (IETF).  Note that other groups may also distribute
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   This Internet-Draft will expire on May 6, 2021.

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
   Provisions Relating to IETF Documents
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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   4
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   5
   3.  uSID Allocation within a uSID Block . . . . . . . . . . . . .   6
     3.1.  GIB, LIB, global uSID and local uSID  . . . . . . . . . .   6
       3.1.1.  Global uSID . . . . . . . . . . . . . . . . . . . . .   6
       3.1.2.  Local uSID  . . . . . . . . . . . . . . . . . . . . .   6

Filsfils, et al.           Expires May 6, 2021                  [Page 2]
Internet-Draft       NET-PGM: SRv6 uSID instruction        November 2020

       3.1.3.  Reference Illustration  . . . . . . . . . . . . . . .   6
   4.  SRv6 behaviors associated with a uSID . . . . . . . . . . . .   8
     4.1.  uSID behaviors related to the IGP . . . . . . . . . . . .   8
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