We're Sorry, Full Content Access is for Members Only...

If you like to keep on reading, Become a Member Now! Here is Why:

  • Learn any CCNA, CCNP and CCIE R&S Topic. Explained As Simple As Possible.
  • Try for Just $1. The Best Dollar You've Ever Spent on Your Cisco Career!
  • Full Access to our 639 Lessons. More Lessons Added Every Week!
  • Content created by Rene Molenaar (CCIE #41726)


351 New Members signed up the last 30 days!


100% Satisfaction Guaranteed!
You may cancel your monthly membership at any time.
No Questions Asked!

Forum Replies

  1. Inverse ARP will take care of that. If you use “frame-relay interface DLCI” on a multipoint sub-interface then it will work.

  2. @Forrest That’s right, in that example I only solved the problem for the ping from R3 to R2 by adding a frame-relay map on R2. For the other way around, you should add a map on R3 as well.

    The underlying problem here is that EIGRP expects the network to be multi-access, this means that all devices should be able to reach each other directly. In reality, only the hub can reach the spokes directly. You won’t be able to estalish an EIGRP adjacency between R2/R3 directly with only PVCs to the hub.

    It’s better to use frame-relay point-to-point everywhere instead. Yo

    ... Continue reading in our forum

  3. Hi,

    My question is if we have to configure also the spoke routers with the same type of logical sub-interface that we use in the hub? In other examples, and I used it as well on GNS3, I configured my hub router with logical sub-interfaces (point-to-point)/(multi-point) but for the spoke routers I always used the physical interface regardless the setup on the hub router. Is this approach correct ? Thus my configuration on the spokes was always done with the "frame-relay map ip ", which I take into account both for the hub router and rest of spokes. Thus I use

    ... Continue reading in our forum

  4. Hello Konstantinos!

    The spoke routers can be configured to function using a subinterface or using the physical interface for both point to point configurations (each link between routers has its own subnet) or point to multipoint configurations (all routers are in the same subnet). It is a good idea however to use subinterfaces because the numbers used for the subinterface can correspond to the DLCIs of the PVC. It is also a more symmetric configuration having both ends configured in the same way. The functionality will be the same however.

    I hope this has been helpful!


  5. Hello Oliver

    When configuring subinterfaces to function with Frame Relay, it is necessary to first configure the main physical interface with frame relay encapsulation. There is no need to configure an IP address as each subinterface will have its own IP address.

    I hope this has been helpful!


15 more replies! Ask a question or join the discussion by visiting our Community Forum