OSPFv3 LSA Extendibility
draft-ietf-ospf-ospfv3-lsa-extend-18

Document Type Active Internet-Draft (ospf WG)
Last updated 2017-11-26 (latest revision 2017-11-21)
Replaces draft-acee-ospfv3-lsa-extend
Stream IETF
Intended RFC status Proposed Standard
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Stream WG state Submitted to IESG for Publication (wg milestone: Dec 2016 - Standardize OSPFv3 ... )
Document shepherd Peter Psenak
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Network Working Group                                          A. Lindem
Internet-Draft                                                    A. Roy
Intended status: Standards Track                           Cisco Systems
Expires: May 25, 2018                                        D. Goethals
                                                                   Nokia
                                                         V. Reddy Vallem

                                                                F. Baker

                                                       November 21, 2017

                        OSPFv3 LSA Extendibility
                draft-ietf-ospf-ospfv3-lsa-extend-18.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

   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
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   This Internet-Draft will expire on May 25, 2018.

Lindem, et al.            Expires May 25, 2018                  [Page 1]
Internet-Draft          OSPFv3 LSA Extendibility           November 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
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   described in the Simplified BSD License.

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 . . . . . . . . . . . . . . . . .   7
     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  . . . . . . . . . . .  27
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