From: Mingzhou Nie (mnie@yahoo.com)
Date: Sun Sep 29 2002 - 22:40:54 GMT-3
Your formula is only valid when K5 is not equal to 0. When K5 is 0, the
second square brack is ignored.
********
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)]
********
Ming, CCIE #10342
--- baganini@attbi.com wrote:
> Hi all,
>
> Something very basic I have Noticed with the IGRP metric
> equation I found in Doyle's book and on the link
> http://www.cisco.com/warp/public/103/3.html I wanted to
> share with you. The metric equation is shown as
>
> Metric = [ K1 * Bandwidth + (K2 * Bandwidth)/(256-load)
> + K3*Delay ]*[K5/(reliability + K4)]
>
> Now this question is for all you mathematicians here.
> If K5 is 0 all what number is in the second square
> brackets will be zero. So, the result of
> [ K1 * Bandwidth + (K2 * Bandwidth)/(256-load) +
> K3*Delay ] multiplied by zero, will be zero, unless the
> * sign means something else other that multiplication.
> In order to have the second square bracket to be a term,
> you sign between them should be a (+), for example.
>
> What do think??
>
> --
> Tom Thouma
> CCIE# 7003
> Director of Research & Development
> thouma@cyscoexpert.com
>
> CyscoExpert, Inc.
> 4433 W. Touhy Ave.
> LincolnWood, IL 60712
> info@cyscoexpert.com
> Ph:(847) 674-3392
> FX:(847) 674-2625
=====
Mingzhou Nie, CCIE #10342
This archive was generated by hypermail 2.1.4 : Mon Oct 07 2002 - 07:44:07 GMT-3