Extensions to OSPF for Advertising Optional Router Capabilities

Document Type Replaced Internet-Draft (individual)
Last updated 2015-02-01 (latest revision 2014-07-31)
Replaced by RFC 7770
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


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.


Acee Lindem (acee@cisco.com)
Naiming Shen (naiming@cisco.com)
Vasseur Jp (jpv@cisco.com)
Rahul Aggarwal (raggarwa_1@yahoo.com)
Scott Shaffer (sshaffer@akamai.com)

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)