You could put a linux router infront of them with an ethernet connection to each server and then another out to your main router. Make a bash script to check that the primary is up, if its not have it change the route to go out the other interface, which would be the secondary.
-- Kevin - [EMAIL PROTECTED] -- Original message -- > Hi, > This is not a really load balancing question, but similar sort > of thing. > We are an isp here and we would like to set up two webservers > that are completely tranparent(rsync daily). > We will only be using one webserver to server all the pages, but > if it goes down, we would like the second webserver to take over > without any downtime. > Is there any programs out there that does this? > Thanks. > Shao.