OSPF Extensions for Segment Routing
draft-ietf-ospf-segment-routing-extensions-09

Document Type Active Internet-Draft (ospf WG)
Last updated 2016-07-24 (latest revision 2016-07-06)
Replaces draft-psenak-ospf-segment-routing-extensions
Stream IETF
Intended RFC status Proposed Standard
Formats plain text pdf html bibtex
Stream WG state WG Document Jun 2016
Document shepherd Acee Lindem
Shepherd write-up Show (last changed 2016-06-07)
IESG IESG state AD is watching
Consensus Boilerplate Yes
Telechat date
Responsible AD Alia Atlas
Send notices to "Acee Lindem" <acee@cisco.com>
Open Shortest Path First IGP                              P. Psenak, Ed.
Internet-Draft                                           S. Previdi, Ed.
Intended status: Standards Track                             C. Filsfils
Expires: January 7, 2017                             Cisco Systems, Inc.
                                                              H. Gredler
                                                              Individual
                                                               R. Shakir
                                               Jive Communications, Inc.
                                                           W. Henderickx
                                                                   Nokia
                                                             J. Tantsura
                                                              Individual
                                                            July 6, 2016

                  OSPF Extensions for Segment Routing
             draft-ietf-ospf-segment-routing-extensions-09

Abstract

   Segment Routing (SR) allows a flexible definition of end-to-end paths
   within IGP topologies by encoding paths as sequences of topological
   sub-paths, called "segments".  These segments are advertised by the
   link-state routing protocols (IS-IS and OSPF).

   This draft describes the OSPF extensions required for Segment
   Routing.

Requirements Language

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in RFC 2119 [RFC2119].

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 http://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."

Psenak, et al.           Expires January 7, 2017                [Page 1]
Internet-Draft     OSPF Extensions for Segment Routing         July 2016

   This Internet-Draft will expire on January 7, 2017.

Copyright Notice

   Copyright (c) 2016 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
   (http://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
   to this document.  Code Components extracted from this document must
   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  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Segment Routing Identifiers . . . . . . . . . . . . . . . . .   3
     2.1.  SID/Label Sub-TLV . . . . . . . . . . . . . . . . . . . .   4
   3.  Segment Routing Capabilities  . . . . . . . . . . . . . . . .   4
     3.1.  SR-Algorithm TLV  . . . . . . . . . . . . . . . . . . . .   4
     3.2.  SID/Label Range TLV . . . . . . . . . . . . . . . . . . .   6
   4.  OSPF Extended Prefix Range TLV  . . . . . . . . . . . . . . .   7
   5.  Prefix SID Sub-TLV  . . . . . . . . . . . . . . . . . . . . .   9
   6.  SID/Label Binding Sub-TLV . . . . . . . . . . . . . . . . . .  13
     6.1.  ERO Metric Sub-TLV  . . . . . . . . . . . . . . . . . . .  14
     6.2.  ERO Sub-TLVs  . . . . . . . . . . . . . . . . . . . . . .  15
       6.2.1.  IPv4 ERO Sub-TLV  . . . . . . . . . . . . . . . . . .  15
       6.2.2.  Unnumbered Interface ID ERO Sub-TLV . . . . . . . . .  16
       6.2.3.  IPv4 Backup ERO Sub-TLV . . . . . . . . . . . . . . .  17
       6.2.4.  Unnumbered Interface ID Backup ERO Sub-TLV  . . . . .  18
   7.  Adjacency Segment Identifier (Adj-SID)  . . . . . . . . . . .  19
     7.1.  Adj-SID Sub-TLV . . . . . . . . . . . . . . . . . . . . .  20
     7.2.  LAN Adj-SID Sub-TLV . . . . . . . . . . . . . . . . . . .  21
   8.  Elements of Procedure . . . . . . . . . . . . . . . . . . . .  23
     8.1.  Intra-area Segment routing in OSPFv2  . . . . . . . . . .  23
     8.2.  Inter-area Segment routing in OSPFv2  . . . . . . . . . .  23
Show full document text