Implementing and Administering Cisco Solutions: Load Balancing EIGRP Routes

Load Balancing EIGRP Routes

Question

You have two paths for the 10.10.10.0 network - one that has a feasible distance of 3072 and the other of 6144.

What do you need to do to load balance your EIGRP routes?

Answers

Explanations

Click on the arrows to vote for the correct answer

A. B. C. D.

BC

To load balance EIGRP routes, the answer is A. Change the maximum paths to 2.

EIGRP is a routing protocol that supports unequal-cost load balancing by default. This means that if there are multiple paths to a destination network, EIGRP will automatically load balance the traffic across these paths.

In this scenario, there are two paths for the 10.10.10.0 network, but they have different feasible distances. The feasible distance is the metric used by EIGRP to determine the best path to a destination network. The lower the feasible distance, the better the path.

To load balance the traffic across these two paths, we need to change the maximum paths to 2. The maximum paths command controls the maximum number of equal-cost paths that EIGRP can use for load balancing. By default, the maximum paths is set to 1, which means that EIGRP will only use the best path to a destination network.

For example, to change the maximum paths to 2, we can use the following command:

scss
Router(config-router)# maximum-paths 2

This will allow EIGRP to use both paths for load balancing. EIGRP will distribute the traffic across the paths in proportion to their feasible distances. In this case, EIGRP will use both paths, but the path with a feasible distance of 3072 will carry 2/3 of the traffic, and the path with a feasible distance of 6144 will carry 1/3 of the traffic.

Option B is incorrect because changing the configuration so they both have the same feasible distance would be difficult or impossible, and even if it was possible, it would defeat the purpose of having multiple paths in the first place.

Option C is incorrect because changing the variance for the path that has a feasible distance of 3072 to 2 would also distribute the traffic across both paths, but it would not necessarily balance the traffic evenly between the two paths. The variance command is used to adjust the feasibility condition for load balancing, and it is not necessary in this scenario.

Option D is incorrect because changing the IP addresses so both paths have the same source IP address would not affect EIGRP load balancing at all. EIGRP load balancing is based on the feasible distances, not the source IP addresses.