OSPFv3 LSA Extendibility
draft-ietf-ospf-ospfv3-lsa-extend-13

Document Type Active Internet-Draft (ospf WG)
Last updated 2016-10-21
Replaces draft-acee-ospfv3-lsa-extend
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Stream WG state WG Document Dec 2016
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Network Working Group                                          A. Lindem
Internet-Draft                                              S. Mirtorabi
Intended status: Standards Track                                  A. Roy
Expires: April 24, 2017                                    Cisco Systems
                                                                F. Baker

                                                        October 21, 2016

                        OSPFv3 LSA Extendibility
                draft-ietf-ospf-ospfv3-lsa-extend-13.txt

Abstract

   OSPFv3 requires functional extension beyond what can readily be done
   with the fixed-format Link State Advertisement (LSA) as described in
   RFC 5340.  Without LSA extension, attributes associated with OSPFv3
   links and advertised IPv6 prefixes must be advertised in separate
   LSAs and correlated to the fixed-format LSAs.  This document extends
   the LSA format by encoding the existing OSPFv3 LSA information in
   Type-Length-Value (TLV) tuples and allowing advertisement of
   additional information with additional TLVs.  Backward compatibility
   mechanisms are also described.

Status of This Memo

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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

Lindem, et al.           Expires April 24, 2017                 [Page 1]
Internet-Draft          OSPFv3 LSA Extendibility            October 2016

   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  Requirements notation . . . . . . . . . . . . . . . . . .   4
     1.2.  OSPFv3 LSA Terminology  . . . . . . . . . . . . . . . . .   4
     1.3.  Acknowledgments . . . . . . . . . . . . . . . . . . . . .   4
   2.  OSPFv3 Extended LSA Types . . . . . . . . . . . . . . . . . .   4
   3.  OSPFv3 Extended LSA TLVs  . . . . . . . . . . . . . . . . . .   5
     3.1.  Prefix Options Extensions . . . . . . . . . . . . . . . .   6
       3.1.1.  N-bit Prefix Option . . . . . . . . . . . . . . . . .   6
     3.2.  Router-Link TLV . . . . . . . . . . . . . . . . . . . . .   7
     3.3.  Attached-Routers TLV  . . . . . . . . . . . . . . . . . .   8
     3.4.  Inter-Area-Prefix TLV . . . . . . . . . . . . . . . . . .  10
     3.5.  Inter-Area-Router TLV . . . . . . . . . . . . . . . . . .  11
     3.6.  External-Prefix TLV . . . . . . . . . . . . . . . . . . .  12
     3.7.  Intra-Area-Prefix TLV . . . . . . . . . . . . . . . . . .  13
     3.8.  IPv6 Link-Local Address TLV . . . . . . . . . . . . . . .  14
     3.9.  IPv4 Link-Local Address TLV . . . . . . . . . . . . . . .  15
     3.10. IPv6-Forwarding-Address Sub-TLV . . . . . . . . . . . . .  16
     3.11. IPv4-Forwarding-Address Sub-TLV . . . . . . . . . . . . .  16
     3.12. Route-Tag Sub-TLV . . . . . . . . . . . . . . . . . . . .  17
   4.  OSPFv3 Extended LSAs  . . . . . . . . . . . . . . . . . . . .  17
     4.1.  OSPFv3 E-Router-LSA . . . . . . . . . . . . . . . . . . .  17
     4.2.  OSPFv3 E-Network-LSA  . . . . . . . . . . . . . . . . . .  19
     4.3.  OSPFv3 E-Inter-Area-Prefix-LSA  . . . . . . . . . . . . .  20
     4.4.  OSPFv3 E-Inter-Area-Router-LSA  . . . . . . . . . . . . .  21
     4.5.  OSPFv3 E-AS-External-LSA  . . . . . . . . . . . . . . . .  22
     4.6.  OSPFv3 E-NSSA-LSA . . . . . . . . . . . . . . . . . . . .  23
     4.7.  OSPFv3 E-Link-LSA . . . . . . . . . . . . . . . . . . . .  24
     4.8.  OSPFv3 E-Intra-Area-Prefix-LSA  . . . . . . . . . . . . .  26
   5.  Malformed OSPFv3 Extended LSA Handling  . . . . . . . . . . .  26
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