Failover ISP

[RadioX]

I have two ISP's currently. One of them hosting a DS3 and the other with 4 t1's I am using policy routing to route my IP's with each provider. What I would like to do is use one of them for a failover so if ISP1 goes downt the IP's route out of ISP2 and people from the internet can get to my web stes through ISP 2 if ISP1 fails. How can I do this. I dont mind having to do it manually like cutting off Policy routing o anything like that. Just want to have a backup in case one fails.

Thanks for your help
Ron

 

[ccie9545]

you can run BGP, in which case you would advertise your routes to both of the ISPs and the Internet would take whichever path was deemed better. If you didn't want to use both of them at the same time, cisco offers a conditional advertisement feature that allows you to advertise, or not advertise, networks based on your routing and bgp table.

I do beleive that dynamic DNS would work in this situation as well. i am not overly familiar with it, but i have seen it mentioned many times in this forum, so should not be too difficulut to gather the info.

hope this helps.... Erik Rudnick, CCIE No. 9545
mailto:erik@kuriosity.com