OSPFv3 Extensions for Segment Routing
draft-ietf-ospf-ospfv3-segment-routing-extensions-09

Document Type Active Internet-Draft (ospf WG)
Last updated 2017-03-08
Replaces draft-psenak-ospf-segment-routing-ospfv3-extension
Stream IETF
Intended RFC status Proposed Standard
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Stream WG state WG Document Jun 2017
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Open Shortest Path First IGP                              P. Psenak, Ed.
Internet-Draft                                           S. Previdi, Ed.
Intended status: Standards Track                             C. Filsfils
Expires: September 9, 2017                           Cisco Systems, Inc.
                                                              H. Gredler
                                                            RtBrick Inc.
                                                               R. Shakir
                                                            Google, Inc.
                                                           W. Henderickx
                                                                   Nokia
                                                             J. Tantsura
                                                              Individual
                                                           March 8, 2017

                 OSPFv3 Extensions for Segment Routing
          draft-ietf-ospf-ospfv3-segment-routing-extensions-09

Abstract

   Segment Routing (SR) allows for 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 OSPFv3 extensions that are 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
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   material or to cite them other than as "work in progress."

Psenak, et al.          Expires September 9, 2017               [Page 1]
Internet-Draft    OSPFv3 Extensions for Segment Routing       March 2017

   This Internet-Draft will expire on September 9, 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
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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Segment Routing Identifiers . . . . . . . . . . . . . . . . .   3
     2.1.  SID/Label Sub-TLV . . . . . . . . . . . . . . . . . . . .   3
   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  . . . . . . . . . . . . . . . . .   7
     3.4.  SRMS Preference Sub-TLV . . . . . . . . . . . . . . . . .   9
     3.5.  SR-Forwarding Capabilities  . . . . . . . . . . . . . . .  10
   4.  OSPFv3 Extended Prefix Range TLV  . . . . . . . . . . . . . .  10
   5.  Prefix SID Sub-TLV  . . . . . . . . . . . . . . . . . . . . .  12
   6.  SID/Label Binding Sub-TLV . . . . . . . . . . . . . . . . . .  16
     6.1.  ERO Metric Sub-TLV  . . . . . . . . . . . . . . . . . . .  18
     6.2.  ERO Sub-TLVs  . . . . . . . . . . . . . . . . . . . . . .  19
       6.2.1.  IPv4 ERO Sub-TLV  . . . . . . . . . . . . . . . . . .  19
       6.2.2.  IPv6 ERO Sub-TLV  . . . . . . . . . . . . . . . . . .  20
       6.2.3.  Unnumbered Interface ID ERO Sub-TLV . . . . . . . . .  21
       6.2.4.  IPv4 Backup ERO Sub-TLV . . . . . . . . . . . . . . .  22
       6.2.5.  IPv6 Backup ERO Sub-TLV . . . . . . . . . . . . . . .  23
       6.2.6.  Unnumbered Interface ID Backup ERO Sub-TLV  . . . . .  24
   7.  Adjacency Segment Identifier (Adj-SID)  . . . . . . . . . . .  25
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