DNS failover looks like a neat idea, but does not work well that good. Until a new DNS entry propagates it could take a really really long time. also using anyc

DNS failover looks like a neat idea, but does not work well that good. Until a new DNS entry propagates it could take a really really long time. also using anycast/ecmp via bgp means that you have a single ip that is highly redudant because it can be backed by many servers.