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Forum Replies

  1. Hello Sims

    There are a couple of options for creating a frame relay topology.

    If you have multiple sites, you can place all routers from all the sites on one subnet like so:


    Notice that all serial interfaces are on the same subnet of This topology does not require a separate subnet for each link, but one subnet for all routers. This requires the employment of a static frame relay map to map between a next hop protocol address and a DLCI destina

    ... Continue reading in our forum

  2. Hello Rene, I am having issue to set up ospf on my frame relay in GNS3. Below is my configs and topology:


    HQ#show run int s2/0
    Building configuration...
    Current configuration : 263 bytes
    interface Serial2/0
     ip address
     encapsulation frame-relay
     ip ospf 1 area 0
     serial restart-delay 0
     frame-relay map ip 103 broadcast
     frame-relay map ip 102 broadcast
     no frame-relay inverse-arp
    HQ#show i
    ... Continue reading in our forum

  3. Hello sales2161

    Frame-relay can be tricky when implemented with OSPF. Can you tell us a little bit more about your configuration? Please specify in more detail the problem that you’re facing so that we can address it more effectively.



  4. Hello sales2161

    If you look at this lesson, you will find information concerning the implementation of OSPF in a frame relay environment:


    Now based on your configuration, what I do see immediately is that in your frame relay interfaces, you are missing the ip ospf network broadcast command. This changes the default OSPF network type to allow for broadcasts to be sent over non broadcast topologies such as frame relay and to allow them to create OSPF adjacencies.

    Take a look at the les

    ... Continue reading in our forum

  5. Hello sales2161

    In order for OSPF to function, you require the broadcast keyword for both the frame-relay map command and the ip ospf network command. If you don’t do this, you can always make OSPF work by manually configuring the neighbors.

    I hope this has been helpful!


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