Sunday, 14 April 2013




  • Cable the network
  • Assign IP addresses and clock rates on DCEs
  • Configure EIGRP
  • Examine ip route and EIGRP topology

Configure EIGRP

First for EIGRP to calculate the bandwidth correctly we will need to use the bandwidth command on each interface.

R1(config-if)#int s0/0
R1(config-if)#bandwidth 48000
R1(config-if)#int s0/1
R1(config-if)#bandwidth 1200

R1(config-if)#int s0/2
R1(config-if)#bandwidth 2400

You will need to advertise the networks that each router is directly connected to.

R1(config)#router eigrp 1
R1(config-router)#no auto-summary

I have configured the routers with the correct network commands. You should see the following output when a new EIGRP adjacency is established.

%DUAL-5-NBRCHANGE: IP-EIGRP 1: Neighbor (Serial0/1) is up: new adjacency

 Examine IP route and EIGRP topology

 From the output below you can see the currently active routes and the routers learned via EIGRP (D)

You can summarise the output further with the following command;

The output below shows the EIGRP topology, form this you can see which routes will be injected if the successor route fails.

From this you can see if the Successor route to the .16 ( via network were to fail, the Feasible Successor route will be injected into the routing table. In this case network will be available through


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