OSPF Hybrid Broadcast and P2MP Interface Type

Document Type Replaced Internet-Draft (individual)
Last updated 2012-07-05 (latest revision 2010-10-25)
Replaced by draft-ietf-ospf-hybrid-bcast-and-p2mp
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


This document describes a mechanism to model a broadcast network as a hybrid of broadcast and point-to-multipoint networks for purposes of OSPF operation. Neighbor discovery and maintenance as well as LSA database synchronization are performed using the broadcast model, but the network is represented using the point-to-multipoint model in the router LSAs of the routers connected to it. This allows an accurate representation of the cost of communication between different routers on the network, while maintaining the network efficiency of broadcast operation. This approach is relatively simple and requires minimal changes to OSPF.


Nischal Sheth (nsheth@juniper.net)
Lili Wang (liliw@juniper.net)
Zhaohui Zhang (zzhang@juniper.net)

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