A large international ISP has hired you as one of their network engineers. The ISP still has a fairly large customer that is using an older frame-relay network. All of your colleagues are too busy working with MPLS and you are the only one who is capable of fixing frame-relay problems. Whenever router Tilburg is sending major EIGRP updates there are problems with congestion. Think you can tune EIGRP so this network won’t have congestion anymore?
- All IP addresses have been preconfigured for you as specified in the topology picture.
- Every router has a loopback0 interface:
Tilburg: 184.108.40.206 /24
NewDelhi: 220.127.116.11 /24
Berlin: 18.104.22.168 /24
Paris: 22.214.171.124 /24
NewYork: 126.96.36.199 /24
- You are not allowed to make any changes to the frame-relay configurations.
- In this topology you can see 4 spoke routers but in reality there are 10 spoke routers. I didn’t add them all to save CPU power when you run this topology. Each PVC has a CIR of 64kbps.
- Router Tilburg has a serial interface 0/0 that only has a physical bandwidth of 256kbps.
- Configure EIGRP AS 1 on all routers and make sure you have full connectivity.
- Whenever router Tilburg sends EIGRP updates to all spoke routers there is congestion because the physical bandwidth of serial interface s0/0 is only 256kbps.
- Configure your network so the bandwidth reflects the CIR on the PVCs and EIGRP will only use 50% of the CIR.
It took me 1000s of hours reading books and doing labs, making mistakes over and over again until I mastered all the routing protocols for CCNP.
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