From: Moin, Imran (imoin@virtela.net)
Date: Thu Aug 10 2006 - 03:00:35 ART
Ok, that makes more sense. I almost threw my math books out of the window............:)
Thanks for checking into it for me.
- Imran.
-----Original Message-----
From: Loc Pham [mailto:LOC.Pham@comcast.net]
Sent: Wednesday, August 09, 2006 11:18 PM
To: WorkerBee; Moin, Imran
Cc: ELDHO PAUL; Group Study (E-mail)
Subject: Re: IE Vol II Lab 1 - EIGRP Metrics
Not really, cisco do correct at this time ;-)))
http://www.cisco.com/univercd/cc/td/doc/product/software/ios124/124cr/hirp_r/rte_eih.htm#wp1097416
The formula only apply when K5 is NON-ZERO.
HTH,
lP
-------------- Original message ----------------------
From: WorkerBee <ciscobee@gmail.com>
> 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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