Earlier quoted context omitted.
Have they implemented IP failover already? I haven't heard anything. Having your own LB without being able to fail over the IP is not HA. If the LB does down so does your business.
What? You use DNS failover and multiple load balancers. FOO.COM A record -> 1.2.3.4, 1.2.3.5, 1.2.3.6 Then at 1.2.3.4, 1.2.3.5, and 1.2.3.6 you put a load balancer that splits loads between all of your clients. Any LB goes down, and DNS client retries will deal with it. If any backend server goes down, your LB will deal with it. Using this pretty successfully at digital ocean right now. What is the downside? I guess…
Among other things, IE7 will pin IPs for 30 minutes, non-browser clients may have serious issues, etc.