Re: Failover router ?

Hi,


We have an application that during 8am-5pm it
cannot fail. We want to use redundancy (not a cluster) should the main
machine fail

you are looking for an IP failover solution.

and on failure route everything to a backup perhaps on
another subnet. The big question is would we manually have to change
the routing rules? Or can a router detect the failure and re-route
automagically?

you don't need changing routes as soon as the (virtual) gw IP will
still be seen up when one of your two routers will die...

Look at VRRP for more info.
carp/ucarp are some free userspace implementations of the latest.

--
Mathieu

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