From: Yoshe Rionando (Rionando@swadharma.com)
Date: Mon Jun 05 2006 - 09:08:14 ART
Hi samy,
variance formula variance = 1 + ( hi- bw / lo-bw) rounded-up
let say variance = 2, mean every 2 packet through high b/w interface, 1
packet through low b/w interface, another words say 1:2.
If you want to unequal load balance, let say 1:4, and your config b/w 100
mbps hi and 10 mbps lo
In this case you need to retuning your config b/w interface to meet the
rquirement. It is up to you, lo b/w or hi b/w
example : retune low b/w
variace 1:4
variance = 1 + ( hi- bw / lo-bw)
4 = 1 + ( 100 /lo-bw)
4 = (lo-bw + 100) /lo-bw
4 lo-bw = lo-b-w +100
4 lo-bw - lo-bw = 100
3 lo-bw = 100
lo bw = 100/3
lo-bw = 33.3334
so u need to re config your bandwith to 33333 kbps for lo bandwidth
interface.
plase correct me if i wrong
Yoshe Rionando Y.
PT. Swadharma Duta Data
Network System Dept.
Network System Engineer
phone : 62 21 8318881
fax : 62 21 8297293
mobile : 62 8159084895
"Venkatesh Venkatesh" <kvpalani@gmail.com>
Sent by: nobody@groupstudy.com
05/06/2006 06:55
Please respond to
"Venkatesh Venkatesh" <kvpalani@gmail.com>
To
Sami <sy1977@gmail.com>
cc
ccielab@groupstudy.com
Subject
Re: EIGRP variance
Not sure if you had a chance to look into the following doco before, this
one explains the basic concept
http://www.cisco.com/warp/public/103/19.html
HTH,
Venkatesh
On 6/5/06, Sami <sy1977@gmail.com> wrote:
>
> Group,
>
> I couldn't find a good example of variance command on CCO...how to
> multiply
> in order to have load balancing on multiple paths. Let us say I have one
> route which has FD 20000 , another route has FD 60000 .what variance
value
> should i use ? is it 3
> It means for all the routes which are there for a particular destination
I
> have to look FD for each routes in topology database and then multiply
> accordingly...how it works...appreciate if some one can explain with
some
> example.
>
> Thanks
>
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