Extensions to OSPF for Advertising Optional Router Capabilities
draft-ietf-ospf-rfc4970bis-01

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Last updated 2015-08-04
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Network Working Group                                     A. Lindem, Ed.
Internet-Draft                                                   N. Shen
Obsoletes: 4970 (if approved)                                 J. Vasseur
Intended status: Standards Track                           Cisco Systems
Expires: February 5, 2016                                    R. Aggarwal
                                                                  Arktan
                                                              S. Shaffer
                                                                  Akamai
                                                          August 4, 2015

    Extensions to OSPF for Advertising Optional Router Capabilities
                   draft-ietf-ospf-rfc4970bis-01.txt

Abstract

   It is useful for routers in an OSPFv2 or OSPFv3 routing domain to
   know the capabilities of their neighbors and other routers in the
   routing domain.  This document proposes extensions to OSPFv2 and
   OSPFv3 for advertising optional router capabilities.  A new Router
   Information (RI) Link State Advertisement (LSA) is proposed for this
   purpose.  In OSPFv2, the RI LSA will be implemented with a new opaque
   LSA type ID.  In OSPFv3, the RI LSA will be implemented with a new
   LSA type function code.  In both protocols, the RI LSA can be
   advertised at any of the defined flooding scopes (link, area, or
   autonomous system (AS)).  This document obsoletes RFC 4970 by
   providing a revised specification including support for advertisement
   of multiple instances of the RI LSA and a TLV for functional
   capabilities.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

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   This Internet-Draft will expire on February 5, 2016.

Lindem, et al.          Expires February 5, 2016                [Page 1]
Internet-Draft         OSPF Capability Extensions            August 2015

Copyright Notice

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   document authors.  All rights reserved.

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Requirements Notation . . . . . . . . . . . . . . . . . .   3
     1.2.  Summary of Changes from RFC 4970  . . . . . . . . . . . .   3
   2.  OSPF Router Information (RI) LSA  . . . . . . . . . . . . . .   3
     2.1.  OSPFv2 Router Information (RI) Opaque LSA . . . . . . . .   4
     2.2.  OSPFv3 Router Information (RI) Opaque LSA . . . . . . . .   6
     2.3.  OSPF Router Informational Capabilities TLV  . . . . . . .   6
     2.4.  Assigned OSPF Router Informational Capability Bits  . . .   7
     2.5.  OSPF Router Functional Capabilities TLV . . . . . . . . .   8
     2.6.  Flooding Scope of the Router Information LSA  . . . . . .   9
   3.  Security Considerations . . . . . . . . . . . . . . . . . . .  10
   4.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  10
   5.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  12
     5.1.  Normative References  . . . . . . . . . . . . . . . . . .  12
     5.2.  Informative References  . . . . . . . . . . . . . . . . .  13
   Appendix A.  Acknowledgments  . . . . . . . . . . . . . . . . . .  13
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  13

1.  Introduction

   It is useful for routers in an OSPFv2 [OSPF] or OSPFv3 [OSPFV3]
   routing domain to know the capabilities of their neighbors and other
   routers in the routing domain.  This can be useful for both the
   advertisement and discovery of OSPFv2 and OSPFv3 capabilities.
   Throughout this document, OSPF will be used when the specification is
   applicable to both OSPFv2 and OSPFv3.  Similarly, OSPFv2 or OSPFv3
   will be used when the text is protocol specific.

   OSPF uses the options field in LSAs and hello packets to advertise
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