Manual IP failover from one to another host

Hi *,
I needed a script which enables root on "host 2" to configure another IP to a virtual network interface. This is used in case of unavailability of the origin IP owner (host 1).
I tested the following which works fine in my network:
on host 2:
(activate IP)
ifconfig $NEW_NIC plumb
ifconfig $NEW_NIC $H1_IP netmask $NEW_MASK broadcast $NEW_BROADCAST up
(deactivate)
ifconfig $NEW_NIC unplumb
while activated, host 1 is unreachable via "$H1_IP" but host 2 is. After deactivation it takes only a few seconds to "normalize" routing..
My question is: Under which circumstances this scenario wont work and what can I do to circumvent problems?
Many thanks in advance.
Cheers,
Chris

Did you see the response you received on this question when you posted it to comp.unix.solaris?
actually it sounds to me like you need something like Sun Cluster.

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