RouterMain is configured to use EIGRP. You issue the show ip route command on RouterMain and receive the following partial output:
By default, what will EIGRP use as the metric value of a summarized 10.0.0.0 network? (Select the best answer.)
A. 2195456
B. 2297856
C. 2496256
D. 2681856
E. 2809856
Explanation:
By default, Enhanced Interior Gateway Routing Protocol (EIGRP) will use a metric value of 2195456 for a summarized 10.0.0.0 network. The numbers inside the brackets in the output of the show ip routecommand indicate the administrative distance (AD) and the metric of the route. The first number is the AD, which is used to determine the routing protocol that should be preferred when multiple routes to a destination network exist. The second number is the composite metric. The best route to a destination network is the route with the lowest composite metric value.
When an EIGRP route is summarized, EIGRP finds the component route with the best metric, which is the route with the lowest composite metric value, and uses that metric for the summarized route. Every time a component route within the summary changes, EIGRP must recalculate whether the summarized metric has changed. If the topology changes often, processor overhead can increase significantly. Youcan set a static metric for a summarized route by issuing the summarymetric command. The syntax for the summarymetric command is summarymetric networkaddress subnetmask[bandwidth delay reliability load mtu] [distance administrativedistance].
EIGRP will not use a metric value of 2297856, 2681856, or 2809856 for the summarized network, because these composite metric values are all higher than 2195456. Additionally, EIGRP will not use the average composite metric value of 2496256 for the summarized network.