From: WorkerBee (ciscobee@gmail.com)
Date: Thu Aug 10 2006 - 01:37:54 ART
Hi Imran,
Mathematically, you are correct however if K5 is set to 0, the term
[K5/(Reliability + K4)] is completely ignored! Well, Cisco world is
really irony at times to drive us crazy...
EIGRP Metric = 256*([K1*Bw + K2*Bw/(256-Load) +
K3*Delay]*[K5/(Reliability + K4)]).
The default values for weights are:
* K1 - 1
* K2 - 0
* K3 - 1
* K4 - 0
* K5 - 0
This gives the default formula of 256*(Bw + Delay) for the EIGRP metric.
On 8/10/06, Moin, Imran <imoin@virtela.net> wrote:
> You are correct. However, if you put K5 value of 0 in that equation, then the
> entire metric value will be 0. Wouldnt it?
>
> - Imran.
>
>
>
>
> -----Original Message-----
> From: ELDHO PAUL [mailto:cciein2006@gmail.com]
> Sent: Wednesday, August 09, 2006 10:24 PM
> To: Moin, Imran
> Cc: Group Study (E-mail)
> Subject: Re: IE Vol II Lab 1 - EIGRP Metrics
>
>
>
> metric = [K1*bandwidth + (K2*bandwidth)/(256 - load) + K3*delay] *
> [K5/(reliability + K4)]
>
> This is how metric is calculated.
> Since you are asked to take BW, Load and Delay into account when computing
> EIGRP metrics it becomes metric = [K1*bandwidth + (K2*bandwidth)/(256 - load)
> + K3*delay]
> So only k1,k2 and k3 values are required.
>
>
> On 8/10/06, Moin, Imran < imoin@virtela.net> wrote:
>
> Hello Folks,
>
> I have a question about question 3.5 in IE Volume II Lab1. This question asks
> you to take BW, Load and Delay into account when computing EIGRP metrics.
> Using the formula in the Doc CD, i worked out following K values:
>
> K1 = 1
> K2 = 1
> K3 = 1
> K4 = 0
> K5 = 1
>
> However, the solution guide uses K5 value of 0.
>
> router eigrp 10
> metrics weight 0 1 1 1 0 0
>
> If you use K5 value of 0, then the entire EIGRP metric equation becomes 0.
> This is because everything gets multiplied with the value of K5. So I think
> K5
> should always be 1.
>
> Am I missing something?
>
> Thanks,
>
> Imran Moin
> Senior Network Engineer
> Virtela Communications
> Voice: +1 720-475-4170
> Fax: +1 720-475-4171
> Email: imoin@virtela.net
>
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