Routing Protocols: EIGRP Metric

EIGRP Metric

Bandwidth

Minimum Bandwidth (in kilobits per second) along the path from router to destination network

Load

Load (number in range 1 to 255; 255 being saturated)

Delay

Total Delay (in 10s of microseconds) along the path from router to destination network

Reliability

Reliability (number in range 1 to 255; 255 being the most reliable)

MTU

Minimum path Maximum Transmission Unit (MTU) (never used in the metric calculation)

Formula

Metric = 256*([K1*Bw + K2*Bw/(256-Load) + K3*Delay]*[K5/(Reliability + K4)])

The default is for K1 and K3 to be set to 1, and the rest to zero, effectively reducing the above formula to (Bandwidth + Delay) * 256.