Multicast Open Shortest Path First (MSOPF) is not a separate protocol, but rather is a set of extensions to Open Shortest Path First (OSPF) routing protocol. To allow OSPF to carry multicast routing information, RFC 1584 added a new Link State Advertisement (LSA) type 6 called MOSPF LSA.
Cisco does not support MOSPF.MOSPF is a set of multicast extensions to OSPF that uses LSA Type 6. By default, when a Cisco router receives a Type 6 LSA packet it will generate a "%OSPF- 4-BADLSATYPE" error message. To avoid this error message, you can configure your routers to ignore Type 6 LSA packets:
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#router ospf 100
Router(config-router)#ospf ignore lsa mospf
MOSPF has not enjoyed a particularly wide acceptance for several reasons, mostly related to the fact that it uses a dense-mode multicast-forwarding scheme, and because it is protocol dependant. It turns out to be most useful in networks.
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