A client of mine want' to have a failover between two data centers
i.e. is one data center (or server) goes down (unreachable) then a similar
server located at another data center can take its place
I explaned to him that there is no way to guarantee a switch over through DNS update because we can't control DNS propagation
So I assume the only way, in the advent of a server loss, was is to configure a router on the main site to redirect connections to the secondary site
any other ideas ?