From: Kemal YILDIRIM (kemalhy@gmail.com)
Date: Mon May 29 2006 - 18:46:15 ART
As some commands depreciated by Cisco in time, EIGRP metric calculation
formula need to be handled differently than the original definition.
Actually you will probably not find a good document on Cisco web site about
EIGRP weights setting. The designers of EIGRP protocol, need to think every
possiblities for their work, this is why we have never used K values.
Who wants an unstable network because of unpredictible load that is
effecting the route metric, also who wants a network that has a mtu
dependent metric!
Cisco silently saying that "don't use load, mtu, neither reliability"
Regards,
Kemal
Objects are what is unalterable and subsistent;
their configuration is what is changing and unstable.
So, you need PRACTICE, PRACTICE, AND MORE PRACTICE...
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
James Ventre
Sent: Tuesday, May 30, 2006 12:00 AM
To: CCIEin2006
Cc: Cisco certification
Subject: Re: EIGRP K-values
The (Minimum) MTU is not considered in metric calculation. Minimum MTU
is carried in advertisements though.
James
CCIEin2006 wrote:
Fair enough..but I cannot tell where MTU plugs into the equation...
On 5/29/06, James Ventre <messageboard@ventrefamily.com> wrote:
>Thanks but this does not really tell you that K2 is the metric
for load
Yes, it does. But it requires you to look at the equation and
understand it, rather than just memorizing tidbits. Look at the
snippit surrounding K2.
(K2 * Bandwidth)/(256-load)
If K2 is 0 ..... then outcome of that equation will always be
ZERO (in fractions .... zero over anything is always zero), which
means that the load value is never considered. A Non-Zero value
means the outcome will not be NON-ZERO, thus making a difference.
James
CCIEin2006 wrote:
Thanks but this does not really tell you that K2 is the
metric for load. I need something like this: K1 - Bandwidth
K2 - LoadK3 - DelayK4 - ReliabilityK5 - MTU I'm not sure if
the above values are correct but I would like to have
something along those lines.
On 5/29/06, James Ventre <messageboard@ventrefamily.com >
wrote:
Set K2 to 1 if you want it to consider load.
http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a008009405c
.shtml#rise
Metric = [K1 * Bandwidth + (K2 * Bandwidth)/(256-load) +
K3*Delay] *
[K5/(reliability + K4)]
The default constant values are K1 = K3 = 1 and K2 = K4 =
K5 = 0.
James
CCIEin2006 wrote:
> Hello,
>
> Is there a quick command to find out what eigrp
K-values pertain to the
> different metrics i.e. bandwidth delay reliability load
MTU?
>
> Or is this on the documentation CD? I can't find it.
>
> I would like to have a quick reference so that if asked
on the exam to
> include load and mtu in the EIGRP calculation I would
know which K-values to
> tweak.
>
> Thanks!
>
>
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