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:
Video Solution:
Configuration Files
You need to register to download the GNS3 topology file. (Registration is free!)Once you are logged in you will find the configuration files right here.

Do you want your CCNA or CCNP Certificate?
The How to Master series helps you to understand complex topics like spanning-tree, VLANs, trunks, OSPF, EIGRP, BGP and more.
Written by René Molenaar - CCIE #41726
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
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.
hi Rene
i think this is a very interesting lab, but the video stop at 1:19 min, kindly check,
btw thank you so much for your help, this site is awesome, and you did a gret job.
Rtorres