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

From: Edward S. Desouza (edward_desouza@yahoo.com)
Date: Wed Mar 21 2001 - 06:53:17 EST


Hi,
 I stand corrected........ I gave a soln purely on
what is technically possible. Yes, you are right
.....Advertising specifics does not make much sense.

Rgds,
Edward

--- Gert Doering <gert@greenie.muc.de> wrote:
> 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
> --
> USENET is *not* the non-clickable part of WWW!
>
> //www.muc.de/~gert/
> Gert Doering - Munich, Germany
> gert@greenie.muc.de
> fax: +49-89-35655025
gert.doering@physik.tu-muenchen.de

=====
Edward S. Desouza
23/24 Manali 5,
Evershine Nagar,
Malad (W),
Bombay 400064.
Tel :9122-8886362

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