OSPFv3 LSA Extendibility
draft-ietf-ospf-ospfv3-lsa-extend-15

Document Type Active Internet-Draft (ospf WG)
Last updated 2017-10-09
Replaces draft-acee-ospfv3-lsa-extend
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Stream WG state WG Document (wg milestone: Dec 2016 - Standardize OSPFv3 ... )
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Network Working Group                                          A. Lindem
Internet-Draft                                                    A. Roy
Intended status: Standards Track                           Cisco Systems
Expires: April 12, 2018                                      D. Goethals
                                                                   Nokia
                                                         V. Reddy Vallem
                                                             Huawei, Inc
                                                                F. Baker

                                                         October 9, 2017

                        OSPFv3 LSA Extendibility
                draft-ietf-ospf-ospfv3-lsa-extend-15.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 April 12, 2018.

Lindem, et al.           Expires April 12, 2018                 [Page 1]
Internet-Draft          OSPFv3 LSA Extendibility            October 2017

Copyright Notice

   Copyright (c) 2017 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

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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 . . . . . . . . . . . . . . . . .   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
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