By default, EIGRP uses only bandwidth and Delay when calculating the metric. EIGRP uses these scaled values to determine the total metric to the network:
• metric = [K1 * bandwidth + (K2 * bandwidth) / (256 – load) + K3 * delay] * [K5 /(reliability + K4)]
The default values for K are:
• K1 = 1
• K2 = 0
• K3 = 1
• K4 = 0
• K5 = 0
• K2 = 0
• K3 = 1
• K4 = 0
• K5 = 0
For default behavior, you can simplify the formula as: Metric = Bandwidth + Delay
Reference:
http://www.cisco.com/warp/public/103/eigrp-toc.html#eigrpmetrics
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