Data centers failure proof with CARP.

[Gi Dot]

Hi,

Is it a good idea to use CARP to manage data centers failover?

Say for instance I have a total of 3 public IPs:

Data center A (master CARP): x.x.x.x
Data center B (backup CARP): y.y.y.y
CARP Virtual IP: z.z.z.z

If there is a network outage occurs at data center A, all traffic to IP
z.z.z.z will be routed to IP y.y.y.y.

But I guess this will only work if both x.x.x.x and y.y.y.y IPs belong to
the same subnet?

If this is not a recommended idea (or not feasible), I would appreciate for
any suggestion to make my website 'data centers failure proof'.

Thanks.


--
dot.