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recieving default routes for the internet via 2 seperate ISP's

Just recieved 2 internet handoffs from 2 separate ISP's and now I need to BGP peer with both.
Each handoff is connected to two seperate cisco switches which are trunked together. Each switch also has a Cisco router which will be used to peer with each ISP. I am looking to recieve the default routes from each ISP. I need help with the configuration of this type of setup. I have a /24 IP block that I would like to advertise. Can someone help me with what the config will look like if the following info is assumed? ISP A - AS 100; ISP B - AS 200; my registered IP block 100.100.100.0/24; my AS 300

thanks

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woepwobin

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FREDARCE

ASKER

thanks, can you explain the preflix-list Mynet and what it is actually doing?

woepwobin

One of the purposes of the prefix list is to prevent the router from sending ISP1's routes to ISP2.

Now that I look at it again, the next lines should not be used:

neighbor 100.100.100.2 prefix-list Mynet in
neighbor 100.100.100.2 prefix-list Mynet out

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Because you'll want Router2 to learn about Router1's default routes.

FREDARCE

ASKER

is it same to say that router 2 config will be the same? If both routers are recieving default routes then what will determine which ISP all my traffic will route through?

thanks