Good day!
I'm currently taking up CISCO 2 or CCNA 2 right now.
I want some networking experts to explain this to me detail to detail.
How does EIGRP compute its metric?Â
EIGRP just uses Delay & Bandwidth with Bandwidth taking precedence.
The metric for EIGRP is calculated by multiplying the IGRP metric by 256. Try this formula used to calculate the metric.
I hope it works!
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Hi Jcato,
EIGRP’s metric is calculated by multiplying IGRP metric by 256. So the formula is:
Metric = 256*(((K1*Bw) + (K2*Bw)/(256-Load) + (K3*Delay)) *(K5/(Reliability + K4)))
In which:
K1 = Minimum Bandwidth (in kilobits per second)
K2 = Load (number in range 1 to 255)
K3 = Total Delay (in 10s of microseconds)
K4 = Reliability (number in range 1 to 255)
K5 = Minimum path Maximum Transmission Unit(MTU)
Usually, only Bandwidth and Delay are used in metric calculation. So K1 = 1, K3 =1 and other K-values are zero. MTU is not used in the calculation. It is tracked through the path to find the smallest MTU.
So the formula would be:
Metric = 256 *((K1 * BW) + (K3 * Delay))
I hope it helpful.
