backup real server

[Vicente Ruiz <vjrj@xxxxxxxxxxxxxx>]

Hi everyone:

Can I configure a backup real server? That is, one real server receives
all the requests but when it's down, the backup real server receives
requests (for example this can be useful with http service if I can have
a http backup server with "we are doing maintenance" pages). 

I can't find any comment in the docs about this functionality.

TIA,


Vicente