Hi Basil,
In my original message, I didn't mean "non-equal paths load balance" via IGRP/EIGRP.
These two Cisco proprietary protocol add a parameter called "variance" to allow load
balance happen on several slightly different cost IGP path. What I mean is strictly
equal cost IGP paths, but different bandwidth, then I want a different load share ratio
among them.
thanks!
------------------------------------------
(Mr.) Yu(2) Ning(2)
Support Engineer, Int'l/Domestic Routing
ChinaNET (AS4134) Backbone Operation
Beijing, P.R.C. +86-10-66418105/8121/8122
------------------------------------------
----- Original Message -----
From: "Basil Dolmatov" <dol@east.ru>
To: "Yu Ning" <yuning@cndata.com>; <cisco-nsp@puck.nether.net>
Cc: "Chinanet-vt" <Chinanet-vt@cisco.com>
Sent: Monday, September 25, 2000 5:16 PM
Subject: RE: [nsp] How to adjust the "traffic share count/ratio" of equal cost IGP path ?
>
>
> --------------------------------------------------------
> Basil (Vasily) Dolmatov, CCIE #5347, CCNP-Security, CCDA
> LightCom Corp. http://www.lightcom.ru
>
> >
> > Hi All,
> >
> > We know that if we see equal cost IGP routes, the Cisco box will
> > load balance between
> > the different output interfaces. For example:
> >
> >
> > The "*" sign indicate the current route used. But normally the
> > traffic load will evenly
> > shared in all the parallel paths, no matter how different BW they
> > are. Then I wonder if
> > there is any method to adjust the "traffic share count" of the
> > different output interface,
> > so that I can get an uneven load share?
> >
> > The possibility of this idea comes to me when I dig some document
> > on cisco MPLS-TE, it says
> > that if two MPLS tunnels have different BW, the "traffic share
> > count" will be adjusted according
> > to the bandwidth ratio automatically. Because the load share is
> > based on the CEF, and is generic
> > to all kinds of IGP, then I think it maybe possible in ISIS.
> >
> > Our environment is: GSR with dCEF enable, IOS 12.0 train. IGP=ISIS.
> >
> > Any input? Thanks!
> The only IGP which can load balance over non-equal paths is EIGRP.
>
>
>
>
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