09-01-2003 02:37 PM - edited 03-02-2019 10:01 AM
If the EIGRP metric is given by the following formula:
metric = [K1 * bandwidth + (K2 * bandwidth) / (256 - load) + K3 * delay] * [K5 / (reliability + K4)]
why the defaul formula is given by:
metric = bandwidth + delay
if k5 default value is zero (0) and is multipling all this factor
[K1 * bandwidth + (K2 * bandwidth) / (256 - load) + K3 * delay]
i see the default formula equals to zero, At least i am missunderstanding the formula or the k values.
Hope you can clarify me
Regards,
Aisha Sanes
09-01-2003 06:19 PM
If K5 = 0, the [K5/(reliability + K4)] term is not used.
This is documented in the following URL -
09-02-2003 02:03 AM
Hi,
"The link characteristics from which IGRP calculates its composite metric are bandwidth, delay,load, reliability, and maximum transmission unit (MTU)."
Question:
Where is MTU used in the formula?
Regards,
Milan
09-02-2003 03:02 AM
It's not--EIGRP and IGRP both carry the MTU in their update packets, but neither one use it in their formulas for finding the composite metric. There's some possibility you might be able to match on the MTU in route maps in the future, but there's no way to use this information at the moment.
Russ.W
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