OSPF Extensions for Segment Routing
draft-ietf-ospf-segment-routing-extensions-16

Document Type Active Internet-Draft (ospf WG)
Last updated 2017-05-23
Replaces draft-psenak-ospf-segment-routing-extensions
Stream IETF
Intended RFC status Proposed Standard
Formats plain text pdf html bibtex
Reviews
Stream WG state Submitted to IESG for Publication (wg milestone: Jun 2016 - Standardize OSPFv2 E... )
Document shepherd Acee Lindem
Shepherd write-up Show (last changed 2017-05-04)
IESG IESG state Publication Requested
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: November 24, 2017                           Cisco Systems, Inc.
                                                              H. Gredler
                                                            RtBrick Inc.
                                                               R. Shakir
                                                            Google, Inc.
                                                           W. Henderickx
                                                                   Nokia
                                                             J. Tantsura
                                                              Individual
                                                            May 23, 2017

                  OSPF Extensions for Segment Routing
             draft-ietf-ospf-segment-routing-extensions-16

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 November 24, 2017               [Page 1]
Internet-Draft     OSPF Extensions for Segment Routing          May 2017

   This Internet-Draft will expire on November 24, 2017.

Copyright Notice

   Copyright (c) 2017 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
     3.3.  SR Local Block Sub-TLV  . . . . . . . . . . . . . . . . .   8
     3.4.  SRMS Preference Sub-TLV . . . . . . . . . . . . . . . . .   9
   4.  OSPF Extended Prefix Range TLV  . . . . . . . . . . . . . . .  10
   5.  Prefix SID Sub-TLV  . . . . . . . . . . . . . . . . . . . . .  12
   6.  SID/Label Binding Sub-TLV . . . . . . . . . . . . . . . . . .  16
     6.1.  ERO Metric Sub-TLV  . . . . . . . . . . . . . . . . . . .  17
     6.2.  ERO Sub-TLVs  . . . . . . . . . . . . . . . . . . . . . .  18
       6.2.1.  IPv4 ERO Sub-TLV  . . . . . . . . . . . . . . . . . .  18
       6.2.2.  Unnumbered Interface ID ERO Sub-TLV . . . . . . . . .  19
       6.2.3.  IPv4 Backup ERO Sub-TLV . . . . . . . . . . . . . . .  21
       6.2.4.  Unnumbered Interface ID Backup ERO Sub-TLV  . . . . .  22
   7.  Adjacency Segment Identifier (Adj-SID)  . . . . . . . . . . .  23
     7.1.  Adj-SID Sub-TLV . . . . . . . . . . . . . . . . . . . . .  23
     7.2.  LAN Adj-SID Sub-TLV . . . . . . . . . . . . . . . . . . .  25
   8.  Elements of Procedure . . . . . . . . . . . . . . . . . . . .  26
Show full document text