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Frame Relay TCP and RTP compression

Written by Rene Molenaar on . Posted in Frame Relay

Scenario

You are working at a frame relay provider as the senior network engineer. One of your customers has two PVCs and they are running a lot of TCP and RTP sessions through your frame relay network. The PVCs only have a CIR of 64kbps and you have plenty of CPU power on router Compact and Decrease. Let's see what you can sqeeze out of those packets...

Goal:

  • All IP addresses have been preconfigured for you.
  • Configure two point-to-point subinterfaces for frame relay on router Compact and Decrease.
  • Use network 192.168.23.0 /24 for DLCI 102 - 201.
  • Use network 192.168.32.0 /24 for DLCI 112 - 221.
  • Ensure traffic to router Jack uses network 192.168.23.0 /24 for the next-hop.
  • Ensure traffic to router Emma uses network 192.168.32.0 /24 for the next-hop.
  • Enable RTP compression for the PVC with DLCI 102 - 201.
  • Enable TCP compression for the PVC with DLCI 112 - 221.

IOS:

c3640-jk9s-mz.124-16.bin

Topology:

Frame Relay Compression

Video Solution:

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Comments (2)

  • avatar
    ReneMolenaar

    Hi Owen,

    Thanks for your comment. You are right about the frame-relay mappings...stupid mistake ;D Just removed this.

    About the loopback interfaces, I added those so you can create a static route for each loopback and use a different PVC but we can also use the IP addresses on the physical interfaces so I removed this as well.

    I like to keep things simple so thanks for your help!

    Rene

  • avatar
    orodgers

    Good work finding a couple of useful commands that aren't really intuitive in the command tree. People studying for NP or IE will get good use out of the Config Guide for this one.

    A couple of suggestions:

    1. I don't see what the loopback interfaces have to do with compression. I'd consider getting rid of those goals.
    2. Point-to-point interfaces don't support map commands, which the last two bullet points imply should be used. I think this works better for teaching by using point-to-point subinterfaces, so I'd keep it that way and change the wording. Going to physical interfaces and using map commands wouldn't be as interesting.