The IESG has received a request from the Open Shortest Path First IGP WG (ospf) to consider the following document: - 'Extensions to OSPF for Advertising Optional Router Capabilities' <draft-ietf-ospf-rfc4970bis-04.txt> as Proposed Standard The IESG plans to make a decision in the next few weeks, and solicits final comments on this action. Please send substantive comments to the ietf@ietf.org mailing lists by 2015-10-08. Exceptionally, comments may be sent to iesg@ietf.org instead. In either case, please retain the beginning of the Subject line to allow automated sorting. 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 including support for advertisement of multiple instances of the RI LSA and a TLV for functional capabilities. The file can be obtained via https://datatracker.ietf.org/doc/draft-ietf-ospf-rfc4970bis/ IESG discussion can be tracked via https://datatracker.ietf.org/doc/draft-ietf-ospf-rfc4970bis/ballot/ No IPR declarations have been submitted directly on this I-D.