RE: Redistribute Eigrp AS to Eigrp AS: How do you know

From: Victor Cappuccio (victor@ccbootcamp.com)
Date: Wed Feb 21 2007 - 00:47:09 ART

Hi Wilson

Adding to what Narbik had just said.

This is the geek formula that CISCO uses to calculate the Metric for any
route:

metric = [K1*bandwidth + (K2*bandwidth)/(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. The
term [K5/(Reliability + K4)] is completely ignored if K5 = 0! You can change
the weights if you want to. However, just as with IGRP, these weights must be
the same on all the routers!.

This is well explained in Narbik's CCIE Training..

Thanks,
Victor Cappuccio.
Network Learning Inc - A Cisco Sponsored Organization (SO) YES! We take
Cisco Learning credits!
victor@ccbootcamp.com
http://www.ccbootcamp.com (Cisco Training and Rental Racks)
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-----Original Message-----
From: nobody@groupstudy.com on behalf of Narbik Kocharians
Sent: Tue 2/20/2007 19:15
To: wilson@wilsonch.gotdns.com
Cc: ccielab@groupstudy.com
Subject: Re: Redistribute Eigrp AS to Eigrp AS: How do you know whatmetrics to
use for Bandwitdh & Delay?

Unless otherwise spoecified, i will use the parameters of one of my links,
some people use 1 1 1 1 1500 that would work as well.

On 2/20/07, wilson@wilsonch.gotdns.com <wilson@wilsonch.gotdns.com> wrote:
>
> How do you know what metric values to use for EIGRP to EIGRP
> redistribution?
> How do you come up with the bandwidth & delay values? Thanks
>
> Example:
> router eigrp 2
> redistribute eigrp 1 metric 64 2000 255 1 1500
>
> 64 = bandwidth (Is this max interface speed?)
> 2000 = delay (Where do u get this delay #?)
> 255 = reliability
> 1 = Load
> 1500 = MTU
>
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--
Narbik Kocharians
CCIE# 12410 (R&S, SP, Security)
CCSI# 30832
Network Learning, Inc. (CCIE class Instructor)
www.ccbootcamp.com (CCIE Training)

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