From: Scott Morris (swm@emanon.com)
Date: Wed Sep 14 2005 - 13:07:47 GMT-3
Well.. Ok, so your problem is that when you make modifications to the
interface like that, you are affecting things other than the EIGRP metric
that you want.
If you know what builds a metric then that's a start!
Which begs the next question, of "how else can you modify the metric of an
EIGRP route?"
Thinking through it is half the fun! :)
Scott
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of Arun
Arumuganainar
Sent: Wednesday, September 14, 2005 11:50 AM
To: swm@emanon.com; 'Ed Tan'; 'Group Study'
Subject: Re: EIGRP load balance
Hi Scott ,
I have not tried this with EIGRP but certainly I have done this with OSPF .
We use this very commonly when we wanted to simulate problems with
loadbalancing . we normally run out of serial connections when trying to
simulate customer problems under lab conditions . Work around in such a case
is to use a Ethernet with bandwidth set to appropriate values.
That's is the reason why I believe this will work with eigrp . If load on
your network is significant enough to change your eigrp metric , then you
should set appropriate k values to zero . This will make eigrp metric
similar ospf . And we can get assured load balancing working with out the
use of Variance .
Thanks and Regards
Arun
----- Original Message -----
From: "Scott Morris" <swm@emanon.com>
To: "'Arun Arumuganainar'" <aarumuga@hotmail.com>; "'Ed Tan'"
<tytanx@gmail.com>; "'Group Study'" <ccielab@groupstudy.com>
Sent: Wednesday, September 14, 2005 8:35 PM
Subject: RE: EIGRP load balance
> Actually only bandwidth and delay are used by default.
>
> Sh ip eigrp topology tells you about the routes, metrics and where
> learned to help you decide!
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
> Of
Arun
> Arumuganainar
> Sent: Wednesday, September 14, 2005 10:10 AM
> To: Scott Morris; 'Ed Tan'; 'Group Study'
> Subject: Re: EIGRP load balance
>
> There are two ways you can do the load balancing .
>
> 1) Un-equal cost load balancing ( done through variance )
> 2) Equal cost load balancing ( You need not do any thing for this to
> work
> If metric is same this will be automatically turned on ) .
>
> How to tweak the metric to support load balancing ????
>
> One way I could think of is to use "bandwidth <kbps> " command on the
> interface . This will certainly work for OSPF . But with EIGRP you
> have other parameters as well besides bandwidth ( load , MTU etc ) .
> You will have to give careful consideration if you are using these
> values as well
in
> your EIGRP metric calculations.
>
> If every thing( I mean all the K values ) is left to default ,
> tweaking
the
> bandwidth will definitely turn on the equal-cost load balancing .
>
> Hope this helps .
>
> Thanks and Regards
> Arun
> ----- Original Message -----
> From: "Scott Morris" <swm@emanon.com>
> To: "'Ed Tan'" <tytanx@gmail.com>; "'Group Study'"
<ccielab@groupstudy.com>
> Sent: Wednesday, September 14, 2005 6:37 PM
> Subject: RE: EIGRP load balance
>
>
> > So... Ask yourself some questions.
> >
> > 1. What does the variance command do?
> > 2. If I understand what the variance command does, where do I find
> > the information that it would use to influence its decisions?
> > 3. Once this is found, you have the answer to what needs to change
> > (and which direction) in order to make this work. Go to 'router
> > eigrp 1' and
> use
> > the '?' command to assist in looking for things that will manipulate
> > what you want to.
> >
> > Post your findings and reasons and we'll go from there!
> >
> > DocCD may assist as well.
> >
> > Scott
> >
> > -----Original Message-----
> > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
> > Of Ed Tan
> > Sent: Wednesday, September 14, 2005 2:52 AM
> > To: Group Study
> > Subject: EIGRP load balance
> >
> > Hi group,
> >
> > I am just wondering is it anyway to configure EIGRP load balance
> > without using "variance" command?
> >
> > TIA,
> > Ed
> >
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