BGP load balancing question

Hi,

I have a scenario I'm looking at and wondering if anyone is
aware of any gotchas. I have two different ISP'sconencted
to two different boarder routers. The inside network
connects to the two border routers via BGP and learns
defaults routes from the routers (outbound traffic points to
the boarder routers via load balanced default routes). I'm
thinking about ways to get the traffic to load balance on
the wan links in and out.

One thought is to have full routes sent to the border
routers and advertise internal routes out both border
routers to the ISP's. Then connect the border routers via
iBGP and exchange all routes. Lastly I would implement an
outbound as-path filter to only permit ^$ (to prevent
transit traffic).

Any problems with the above scenario. I'm labbing it up but
hard to test without a lot of routes to simulate the ISP's,
etc.

Thanks

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Received on Sat Jan 22 2011 - 11:30:59 ART