9.3.4 Lab – Calculating the EIGRP Metric Answers
Topology
Learning Objectives:
Upon completion of this lab, you will be able to:
- Modify the EIGRP metric formula
- Verify EIGRP K values
- Verify EIGRP metrics for each route
Scenario:
In this lab activity, you will modify the EIGRP metric formula. This will allow you to see how EIGRP changes the metric a route based on the formula used. The EIGRP metric formula consists of values K1 through K5, known as EIGRP metric weights. By default, K1 and K3 are set to 1, and K2, K4, and K5 are set to 0. The result is that only the bandwidth and delay is used in the computation of the default composite metric.
Task 1: Verify EIGRP Configuration
Step 1 Examine the routing table of each router and verify that there is a path to every network in the topology.
Step 2 Document the default K values used by EIGRP.
Step 3 Document the EIGRP metric for every network on each router.
Task 2: Change the EIGRP Metric Formula
Step 1 By default, EIGRP uses the K1 and K3 metrics. Change the EIGRP metric formula to use K1, K2 and K3. These values should be set to one. Make sure the values for K4 and K5 are set to zero.
Note: When the EIGRP metrics are changed, the routers will lose their neighbor adjacency. Do not let this concern you. When each router is configured with the same formula for calculating best path, the routers will reform their adjacencies.
Step 2 Verify that the correct K values are configured for each router
Step 3 Document the EIGRP metric for every network on each router.
Step 4 Change the EIGRP metric formula to use K1, K2, K3 and K4. Make sure the value for K5 is set to zero.
Step 5 Verify that the correct K values are configured for each router.
Step 6 Document the EIGRP metric for every network on each router.
