Re: Question on K values in EIGRP

From: Bob Sinclair (bsin@cox.net)
Date: Fri Nov 26 2004 - 23:27:01 GMT-3


Mike,

Here are some notes on the EIGRP metric weights. The K4 and K5 values work
together to weight reliability.

Default: metric weights 0 1 0 1 0 0

metric weights tos k1 k2 k3 k4 k5

tos always 0

Defaults: tos: 0 k1: 1 k2: 0 k3: 1 k4: 0 k5: 0

k1: bandwidth

k2: load

k3: delay

k4: part of reliability

k5: part of reliability

Example: To use only Delay: metric weights 0 0 0 1 0 0

If k5 equals 0, the composite IGRP or EIGRP metric is computed according to
the following formula:

metric = [k1 * bandwidth + (k2 * bandwidth)/(256 - load) + k3 * delay]

If k5 does not equal zero, an additional operation is performed:

metric = metric * [k5/(reliability + k4)]

HTH,

Bob Sinclair
CCIE #10427, CCSI 30427, CISSP
www.netmasterclass.net

----- Original Message -----
From: "Mike Flanagan" <mikenoc@mindspring.com>
To: "Ccielab" <Ccielab@groupstudy.com>
Sent: Friday, November 26, 2004 8:56 PM
Subject: Question on K values in EIGRP

> Hello,
>
> Just to make sure that I understand EIGRP K values
> If I use metric weights command then ...
>
> First number is the tos value in the IP header ? Is this set to
> 0 when the tos value is not set ?
> Second value is Bandwidth
> Third value is delay
> Fourth value is Load
> Fifth value is reliabillity
> What is the last value for ?
>
> Thanks,
>
> Mike F.
>
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