Re: EIGRP metric question

From: Schulz, Dave (DSchulz@dpsciences.com)
Date: Mon May 08 2006 - 08:04:34 ART

Thanks, Petr. I see your explanation and it is very clear. Thanks. However, I was trying to see how this relates to the formulae in the docCD for " values, which is slightly different. Any thuoghts?

Dave Schulz
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-----Original Message-----
From: Petr Lapukhov <petrsoft@gmail.com>
To: Schulz, Dave <DSchulz@dpsciences.com>
CC: ccielab@groupstudy.com <ccielab@groupstudy.com>
Sent: Mon May 08 00:51:43 2006
Subject: Re: EIGRP metric question

Dave,

You see, basic EIGRP metric is:

256*[10^7/Bw+Delay]

(Bw is measured in Kb/s)

So here we go:

You have minimum Bw = 64, Delay = 1 + 2000

(2000 is standard delay for serial interface)

256*[10^7/64 + 2000 + 1] = 40512256

Petr

2006/5/8, Schulz, Dave <DSchulz@dpsciences.com>:

        Group -
        
        I am working with EIGRP metric and trying to plan for a metric that is being
        redistributed from ospf into eigrp on a router (R1) and forwarded to R4 via
        EIGRP. So, I have a link between R1 and R4 set up as 64k and R1 looks like
        this:
        
        router eigrp 100
        redistribute ospf 1 metric 10000 1 255 1 1500
        network 172.16.0.0
        no auto-summary
        !
        router ospf 1
        log-adjacency-changes
        redistribute eigrp 100 subnets
        network 192.168.1.0 0.0.0.255 area 0
        neighbor 192.168.1.2
        neighbor 192.168.1.3
        
        Based on the K-values (default) 1 0 1 0 0, I would assume that the formulae
        should allow us to determine the metric at R4:
        
        metric = [K1*bandwidth + (K2*bandwidth)/(256 - load) + K3*delay] *
        [K5/(reliability + K4)]
        
        This metric should be (64000 * 1) + (1 * 10 usec). However, this doesn't seem
        to be case as the show ip route on R4 shows the metric at 40512256.
        
        Gateway of last resort is not set
        
             2.0.0.0/32 <http://2.0.0.0/32> is subnetted, 1 subnets
        D EX 2.2.2.2 [170/40512256] via 172.16.14.1, 00:25:15, Serial1/0
        
        Can someone please help clear up this confusion. Much thanks!
        
        Dave
        
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