OSPFv3 LSA Extendibility
draft-ietf-ospf-ospfv3-lsa-extend-21

Document Type Active Internet-Draft (ospf WG)
Last updated 2018-01-19
Replaces draft-acee-ospfv3-lsa-extend
Stream IETF
Intended RFC status Proposed Standard
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Reviews
Stream WG state Submitted to IESG for Publication (wg milestone: Dec 2016 - Standardize OSPFv3 ... )
Document shepherd Peter Psenak
Shepherd write-up Show (last changed 2017-11-26)
IESG IESG state IESG Evaluation
Consensus Boilerplate Yes
Telechat date On agenda of 2018-01-25 IESG telechat
Needs 7 more YES or NO OBJECTION positions to pass.
Responsible AD Alia Atlas
Send notices to Peter Psenak <ppsenak@cisco.com>
IANA IANA review state Version Changed - Review Needed
IANA action state None
Network Working Group                                          A. Lindem
Internet-Draft                                                    A. Roy
Updates: 5340, 5838 (if approved)                          Cisco Systems
Intended status: Standards Track                             D. Goethals
Expires: July 23, 2018                                             Nokia
                                                         V. Reddy Vallem

                                                                F. Baker
                                                        January 19, 2018

                        OSPFv3 LSA Extendibility
                draft-ietf-ospf-ospfv3-lsa-extend-21.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.

   This document updates RFC 5340, "OSPF for IPv6", and RFC 5838,
   "Support of Address Families in OSPFv3".

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 July 23, 2018.

Lindem, et al.            Expires July 23, 2018                 [Page 1]
Internet-Draft          OSPFv3 LSA Extendibility            January 2018

Copyright Notice

   Copyright (c) 2018 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
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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
   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 . . . . . . . . . . . . . . . . . .   9
     3.5.  Inter-Area-Router TLV . . . . . . . . . . . . . . . . . .  10
     3.6.  External-Prefix TLV . . . . . . . . . . . . . . . . . . .  11
     3.7.  Intra-Area-Prefix TLV . . . . . . . . . . . . . . . . . .  12
     3.8.  IPv6 Link-Local Address TLV . . . . . . . . . . . . . . .  13
     3.9.  IPv4 Link-Local Address TLV . . . . . . . . . . . . . . .  14
     3.10. IPv6-Forwarding-Address Sub-TLV . . . . . . . . . . . . .  15
     3.11. IPv4-Forwarding-Address Sub-TLV . . . . . . . . . . . . .  15
     3.12. Route-Tag Sub-TLV . . . . . . . . . . . . . . . . . . . .  16
   4.  OSPFv3 Extended LSAs  . . . . . . . . . . . . . . . . . . . .  16
     4.1.  OSPFv3 E-Router-LSA . . . . . . . . . . . . . . . . . . .  16
     4.2.  OSPFv3 E-Network-LSA  . . . . . . . . . . . . . . . . . .  18
     4.3.  OSPFv3 E-Inter-Area-Prefix-LSA  . . . . . . . . . . . . .  19
     4.4.  OSPFv3 E-Inter-Area-Router-LSA  . . . . . . . . . . . . .  20
     4.5.  OSPFv3 E-AS-External-LSA  . . . . . . . . . . . . . . . .  21
     4.6.  OSPFv3 E-NSSA-LSA . . . . . . . . . . . . . . . . . . . .  22
     4.7.  OSPFv3 E-Link-LSA . . . . . . . . . . . . . . . . . . . .  23
     4.8.  OSPFv3 E-Intra-Area-Prefix-LSA  . . . . . . . . . . . . .  25
   5.  Malformed OSPFv3 Extended LSA Handling  . . . . . . . . . . .  26
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