[nsp] BGP Entries - Comparison

[Roy]

There can be a big difference between what a provider sends to peers and
what they send to customers.

Customers may see internal routes unaggregated that a peer would not see.

-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net]On Behalf Of Gert Doering
Sent: Wednesday, June 16, 2004 7:44 AM
To: Paul Stewart
Cc: cisco-nsp at puck.nether.net
Subject: Re: [nsp] BGP Entries - Comparison


Hi,

On Wed, Jun 16, 2004 at 10:33:13AM -0400, Paul Stewart wrote:
> Is anyone cutting tables off at /24 and what has your experience been?

We do that, and are not missing anything obvious.

> I thought for some reason that you were not even allowed to advertise any
> subnets smaller than /24's via BGP anyways or am I dreaming? :)

The net.police isn't very active these days.  People advertise arbitrary
specific stuff, de-aggregate their nice an shiny /19 into 32 /24s for
"traffic balancing" reason (buy cheap upstream, let everyone else pay
for your routes), and so on...

gert

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//www.muc.de/~gert/
Gert Doering - Munich, Germany
gert at greenie.muc.de
fax: +49-89-35655025
gert at net.informatik.tu-muenchen.de
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