Which of the following is NOT a possible component of Enhanced Interior Gateway Routing Protocol’s (EIGRP)
composite metric?
A.
Cost
B.
Load
C.
Delay
D.
Bandwidth
Explanation:
Cost is not a component of EIGRP’s composite metric. The cost, or efficiency, of a path is used as a metric by
the Open Shortest Path First (OSPF) routing protocol.
Enhanced IGRP (EIGRP) is Cisco Systems’ proprietary routing protocol. It can use bandwidth, delay, load,
reliability, and maximum transmission unit (MTU) to calculate the metric. Of these five metrics, by default, only
minimum bandwidth and delay are used to compute the best path.
The metric for EIGRP can be calculated with this formula:
Metric = [K1 * Bandwidth + (K2 * Bandwidth) / (256-load) + K3*Delay] * [K5 / (reliability + K4)]
The default constant values for Cisco routers are K1 = 1, K3 = 1, and K2 = 0, K4 = 0, K5 = 0. In the default
setting, K1 and K3 have non-zero values, and therefore, by default, the metric is dependent on bandwidth and
delay.Objective:
Routing Fundamentals
Sub-Objective:
Configure, verify, and troubleshoot EIGRP for IPv4 (excluding authentication, filtering, manual summarization,
redistribution, stub)Cisco > Support > IP > IP Routing > Design > Design TechNotes > Introduction to EIGRP > Document ID:
13669