Re: [nsp] [nsp] best practice for bgp load balancing with unequal bandwidth

From: Gert Doering (gert@greenie.muc.de)
Date: Wed Mar 21 2001 - 04:55:40 EST


Hi,

On Tue, Mar 20, 2001 at 10:03:25PM -0800, Edward S. Desouza wrote:
> You can influence incoming traffic in the scenario
> that you say using two techniques :
> 1. Advertise part of your pool on both links and
> advertise a less specific ( aggregate route ) to both.
> This will help in case your link to one ISP fails.

This shouldn't be done. Never advertise more specifics unless there's
a hard reason to - load balancing isn't. Look at the sorry state of the
global BGP table before giving advice like this.

> 2. Do an AS Path Prepend

3. Check with the upstream provider(s) what kind of "community" settings
   exist to control incoming traffic. This can often be finer grained
   than prepending.

gert

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Gert Doering - Munich, Germany                             gert@greenie.muc.de
fax: +49-89-35655025                        gert.doering@physik.tu-muenchen.de



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