OSPF Point-to-Multipoint Network Type over Frame-Relay

Hello Apoorva

RFC 2328 indicates what kind of hello and LSA communication OSPF uses for each type of network. These are summarized below:

  • Point-to-Point (P2P) - Multicast
  • Point-to-Multipoint (P2MP) - Unicast
  • Broadcast - Multicast
  • Non-broadcast multiple access (NBMA) - Unicast
  • Virtual Link - Unicast

This means that the Point to Multipoint communication between OSPF routers is unicast.

Now having said that, when you configure the frame relay maps in your configuration, you will require the broadcast keyword. The frame relay maps are not actually shown in the lesson so this is why you don’t see the broadcast keyword anywhere.

I hope this has been helpful!


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