Extensions to OSPF for Advertising Optional Router Capabilities
RFC 7770

Document Type RFC - Proposed Standard (February 2016; No errata)
Obsoletes RFC 4970
Last updated 2016-02-01
Replaces draft-acee-ospf-rfc4970bis
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Stream WG state Submitted to IESG for Publication Dec 2015
Document shepherd Yingzhen Qu
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IESG IESG state RFC 7770 (Proposed Standard)
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Internet Engineering Task Force (IETF)                    A. Lindem, Ed.
Request for Comments: 7770                                       N. Shen
Obsoletes: 4970                                              JP. Vasseur
Category: Standards Track                                  Cisco Systems
ISSN: 2070-1721                                              R. Aggarwal
                                                                  Arktan
                                                              S. Shaffer
                                                                  Akamai
                                                           February 2016

    Extensions to OSPF for Advertising Optional Router Capabilities

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.  The Router
   Information (RI) Link State Advertisement (LSA) is defined for this
   purpose.  In OSPFv2, the RI LSA will be implemented with an Opaque
   LSA type ID.  In OSPFv3, the RI LSA will be implemented with a unique
   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 that includes support for
   advertisement of multiple instances of the RI LSA and a TLV for
   functional capabilities.

Status of This Memo

   This is an Internet Standards Track document.

   This document is a product of the Internet Engineering Task Force
   (IETF).  It represents the consensus of the IETF community.  It has
   received public review and has been approved for publication by the
   Internet Engineering Steering Group (IESG).  Further information on
   Internet Standards is available in Section 2 of RFC 5741.

   Information about the current status of this document, any errata,
   and how to provide feedback on it may be obtained at
   http://www.rfc-editor.org/info/rfc7770.

Lindem, et al.               Standards Track                    [Page 1]
RFC 7770               OSPF Capability Extensions          February 2016

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
   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  Requirements Notation . . . . . . . . . . . . . . . . . .   3
     1.2.  Summary of Changes from RFC 4970  . . . . . . . . . . . .   3
   2.  OSPF Router Information (RI) LSA  . . . . . . . . . . . . . .   4
     2.1.  OSPFv2 Router Information (RI) Opaque LSA . . . . . . . .   4
     2.2.  OSPFv3 Router Information (RI) Opaque LSA . . . . . . . .   5
     2.3.  OSPF Router Information LSA TLV Format  . . . . . . . . .   6
     2.4.  OSPF Router Informational Capabilities TLV  . . . . . . .   6
     2.5.  Assigned OSPF Router Informational Capability Bits  . . .   7
     2.6.  OSPF Router Functional Capabilities TLV . . . . . . . . .   8
     2.7.  Flooding Scope of the Router Information LSA  . . . . . .   9
   3.  Backwards Compatibility . . . . . . . . . . . . . . . . . . .   9
   4.  Security Considerations . . . . . . . . . . . . . . . . . . .   9
   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  10
     5.1.  OSPFv2 Opaque LSA Type Assignment . . . . . . . . . . . .  10
     5.2.  OSPFv3 LSA Function Code Assignment . . . . . . . . . . .  10
     5.3.  OSPF RI LSA TLV Type Assignment . . . . . . . . . . . . .  11
     5.4.  Registry for OSPF Router Informational Capability Bits  .  12
     5.5.  Registry for OSPF Router Functional Capability Bits . . .  12
   6.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  12
     6.1.  Normative References  . . . . . . . . . . . . . . . . . .  12
     6.2.  Informative References  . . . . . . . . . . . . . . . . .  13
   Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . .  14
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  15

Lindem, et al.               Standards Track                    [Page 2]
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