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  • Content created by Rene Molenaar (CCIE #41726)

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Forum Replies

  1. Hi Rene,

    This is very good explanation about frame realy to understand frame-realy technology.

    Thanks so much for giving this information to all Networking negineers.

    I am doing CCIE Security please help me how to do the study for CCIE security because I am doing job as well in IT MNC company.

    Khandesha Kothale

  2. Hi Ugyen,

    The frame-relay interface-dlci command is meant for point-to-point frame-relay connections and basically it means “This DLCI belongs to this interface”. It is used often on sub-interfaces because the router doesn’t know which DLCI belongs to which sub-interface. By default all DLCI numbers are assigned to the physical interface…

    The frame-relay map command is different, it is used to map layer 2 information (DLCI) to a layer 3 address (IP address). We use this on frame-relay multipoint interfaces where we can reach multiple routers through the same PVC.

    Hope this helps.


  3. Hi Dominik,

    The CIR rate is the committed rate, in other words the rate that the ISP guarantees that you will get.

    The DE bit indicates that the frame has a lower importance. When there is congestion, the frames with the DE-bit set can be dropped.

    Normally, all frames that exceed the CIR rate will have their DE-bit set so that’s the relationship between the two.


  4. Hi,
    Can you explain the below

    If you use point-to-point it will solve your split-horizon problem but you’ll need to use a different IP subnet per PVC. Point-to-multipoint means you have the split-horizon problem but you can use a single IP subnet for all PVCs.

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