EIGRP Configuration
We're going to modify our existing network.
We'll start with the basic EIGRP configuration on router 1, then move on to the rest of the routers.
The first thing I did when I entered global config was take out the OSPF routing process so that only EIGRP was running. I did this to save processing power on the router only, if EIGRP and OSPF are both running EIGRP routes will be used since EIGRP has a lower AD than OSPF. After that I entered EIGRP configuration for Autonomous System 1, and from there I told EIGRP to route the 172.16.0.0 network. We'll simply repeat this process on all the other routers in the network. Once that has been completed we should have the following routing table from EIGRP.
We see the usual changes in the routing table that we have seen before. The code for routes to remote network has changed to D indicating they are EIGRP routes. The AD has changed to 90, and each route has a very long metric. This metric is computed with a very long formula but for the CCNA you just need to know that the formula uses the minimum bandwidth of a path, as well as the total delay of a bath to calculate a metric.
Take a look at the following network -
Take a look at the following network -
When router 6 computes a metric for router 9 it will use the lowest bandwidth of the path, and the combined delay of the path to calculate the metric. So it will use 10Mbps and 40 delay to compute the metric. As such we can manipulate the bandwidth and delay of a interface to alter the EIGRP metric.
Now that our network is configured with EIGRP let's move on to the various show commands we can use to verify our EIGRP network
Now that our network is configured with EIGRP let's move on to the various show commands we can use to verify our EIGRP network