RE: [nsp] How to adjust the "traffic share count/ratio" of equal cost IGP path ?

From: Basil Dolmatov (dol@east.ru)
Date: Mon Sep 25 2000 - 05:16:18 EDT


--------------------------------------------------------
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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