SRv6 Network Programming
draft-ietf-spring-srv6-network-programming-16

Document Type Active Internet-Draft (spring WG)
Last updated 2020-07-07 (latest revision 2020-06-27)
Replaces draft-filsfils-spring-srv6-network-programming
Stream IETF
Intended RFC status Proposed Standard
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SPRING                                                  C. Filsfils, Ed.
Internet-Draft                                         P. Camarillo, Ed.
Intended status: Standards Track                     Cisco Systems, Inc.
Expires: December 29, 2020                                      J. Leddy
                                                  Individual Contributor
                                                                D. Voyer
                                                             Bell Canada
                                                           S. Matsushima
                                                                SoftBank
                                                                   Z. Li
                                                     Huawei Technologies
                                                           June 27, 2020

                        SRv6 Network Programming
             draft-ietf-spring-srv6-network-programming-16

Abstract

   The SRv6 Network Programming framework enables a network operator or
   an application to specify a packet processing program by encoding a
   sequence of instructions in the IPv6 packet header.

   Each instruction is implemented on one or several nodes in the
   network and identified by an SRv6 Segment Identifier in the packet.

   This document defines the SRv6 Network Programming concept and
   specifies the base set of SRv6 behaviors that enables the creation of
   interoperable overlays with underlay optimization (Service Level
   Agreements).

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
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at https://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on December 29, 2020.

Filsfils, et al.        Expires December 29, 2020               [Page 1]
Internet-Draft          SRv6 Network Programming               June 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
   Provisions Relating to IETF Documents
   (https://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
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   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   4
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   4
     2.1.  Requirements Language . . . . . . . . . . . . . . . . . .   5
   3.  SRv6 SID  . . . . . . . . . . . . . . . . . . . . . . . . . .   6
     3.1.  SID Format  . . . . . . . . . . . . . . . . . . . . . . .   6
     3.2.  SID Allocation within an SR domain  . . . . . . . . . . .   7
     3.3.  SID Reachability  . . . . . . . . . . . . . . . . . . . .   9
   4.  SR Endpoint Behaviors . . . . . . . . . . . . . . . . . . . .  10
     4.1.  End: Endpoint . . . . . . . . . . . . . . . . . . . . . .  11
       4.1.1.  Upper-Layer Header  . . . . . . . . . . . . . . . . .  11
     4.2.  End.X: Layer-3 Cross-Connect  . . . . . . . . . . . . . .  12
     4.3.  End.T: Specific IPv6 Table Lookup . . . . . . . . . . . .  13
     4.4.  End.DX6: Decapsulation and IPv6 Cross-Connect . . . . . .  13
     4.5.  End.DX4: Decapsulation and IPv4 Cross-Connect . . . . . .  14
     4.6.  End.DT6: Decapsulation and Specific IPv6 Table Lookup . .  15
     4.7.  End.DT4: Decapsulation and Specific IPv4 Table Lookup . .  16
     4.8.  End.DT46: Decapsulation and Specific IP Table Lookup  . .  17
     4.9.  End.DX2: Decapsulation and L2 Cross-Connect . . . . . . .  18
     4.10. End.DX2V: Decapsulation and VLAN L2 Table Lookup  . . . .  19
     4.11. End.DT2U: Decapsulation and Unicast MAC L2 Table Lookup .  19
     4.12. End.DT2M: Decapsulation and L2 Table Flooding . . . . . .  20
     4.13. End.B6.Encaps: Endpoint Bound to an SRv6 Policy w/ Encaps  21
     4.14. End.B6.Encaps.Red: End.B6.Encaps with Reduced SRH . . . .  23
     4.15. End.BM: Endpoint Bound to an SR-MPLS Policy . . . . . . .  23
     4.16. Flavors . . . . . . . . . . . . . . . . . . . . . . . . .  24
       4.16.1.  PSP: Penultimate Segment Pop of the SRH  . . . . . .  24
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