2.5.7 Multicast Extensions to OSPF (mospf) *

This Working Group Did Not Meet

NOTE: This charter is a snapshot of the 40th IETF Meeting in Washington, DC. It may now be out-of-date. Last Modified: 11-Jan-96


John Moy <jmoy@casc.com>

Routing Area Director(s):

Joel Halpern <jhalpern@newbridge.com>

Routing Area Advisor:

Joel Halpern <jhalpern@newbridge.com>

Mailing Lists:

General Discussion:mospf@gated.cornell.edu
To Subscribe: mospf-request@gated.cornell.edu

Description of Working Group:

This working group will extend the OSPF routing protocol so that it will be able to efficiently route IP multicast packets. This will produce a new (multicast) version of the OSPF protocol, which will be as compatible as possible with the present version (packet formats and most of the algorithms will hopefully remain unaltered).

Goals and Milestones:



Review outline of proposed changes to OSPF. Identify any unresolved issues and, if possible, resolve them.



Become familiar with the IGMP protocol as documented in RFC 1112. Survey existing work on multicast routing, in particular, Steve Deering's paper ``Multicast Routing in Internetworks and Extended LANs''. Identify areas where OSPF must be extended to support multicast routing. Identify possible points of contention.



The group should have a draft specification. Discuss the specification and make any necessary changes. Discuss implementation methods, using as an example, the existing BSD OSPF code, written by Rob Coltun of the University of Maryland.



Report on implementations of the new multicast OSPF. Fix any problems in the specification that were found by the implementations.



Submit the MOSPF Specification to the IESG as a Proposed Standard.

Jun 96


Update MOSPF to reflect current usage, document interoperability between implementations, and submit to the IESG for consideration as a Draft Standard.

Dec 96


Submit MOSPF to IESG for consideration as a Standard.

Dec 96


Document interoperability between MOSPF and DVMRP, and submit as an Informational RFC.

No Current Internet-Drafts
Request For Comments:







IP Multicast over Token-Ring Local Area Networks



Multicast Extensions to OSPF



MOSPF: Analysis and Experience

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