From: baganini@attbi.com
Date: Mon Sep 30 2002 - 10:58:00 GMT-3
Hi Azhar,
I know that the second bracket is not used when K5 = 0.
The way it works is clear and trivial. I was just
making comment on the over all "mathematical" point of
view.
Best regards
-- Tom Thouma CCIE# 7003 Director of Research & Development thouma@cyscoexpert.comCyscoExpert, Inc. 4433 W. Touhy Ave. LincolnWood, IL 60712 info@cyscoexpert.com Ph:(847) 674-3392 FX:(847) 674-2625 > Hi, > > followig is true about IGRP and EIGRP (multiply by 256) metric calculation: > > default: k1=k3=1 and k2=k4=k5=0 > > Metric = ([ K1 x Bandwidth + (K2 x Bandwidth)/(256-load) + K3 x Delay ] x X) > > ^ > Bandwith = 10^7 / bandwith_of_lowest_link > Delay = SUM(delays_along_the_path) / 10 > X = K5/(reliability + K4) If K5 = 0, the [K5/(reliability + K4)] term is not > used > ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ > Link: http://www.cisco.com/warp/public/103/3.html > > regards > > Azhar M > Germany > > I've read in Karl Solie's book (practical studies vol 1) stated: the > [K5/(reliability + K4)] term is only used if K1<>1 but if k1=1 then X=1. (I must > say, that it personly to me dosent make much sense!!!) > > baganini@attbi.com schrieb am 29.09.02 18:52:37: > > 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
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