In the fall of channel in DTS we leave clients without our service, the server itself works but that's as obvious to him there, usually a few minutes, but it has a negative impact on reputation.
Is the idea to place the backup server in another DC, and in the case of falling of the channel or the server on one and then switch the traffic to another.
But how to do it most properly is not clear.
It seems there are third-party services distribute the load but where is the guarantee that by directing the flow through them, they will not collapse when dose or just a heavy load.
Can you give me advice what to do in this case?