How to automatically masking/unmasking LUN for ip failover?

Hi friends
I need to connect 2 Xserve quad xeon to an Xraid through a Qlogic SANbox 5600Q
All I need to do is to create an ip failover system between the two Xserve.
I don't need a xsan solution, so all I want to do is an "automatic" masking / unmasking of the Xraid when the master Xserve go offline.
Apple manual speaks about LUN masking, but doesn't explain how to made it.
Anybody have some idea?
ps. sorry f my bad english

Thanks William
The problem is maybe nearly solved, I've created the 2 zones that I need and I've made a little script for the zone switching.
Premised that I'm not a script expert;
#!/bin/bash
sleep 3
echo -e "Fake\r" #first fake password for jumping to login
sleep 3
echo -e "login\r" #switch user login
sleep 3
echo -e "password\r" #switch password
sleep 3
echo -e "admin start\r" #start the administration session
sleep 2
echo -e "zoneset activate DestinationZone\r" # start newzone
sleep 2
echo -e "admin end\r" #end the administration session
} | telnet xxx.xxx.xxx.xxx;
I don't like the temporary solution, but at the moment Qlogic support it has not still answered to my questions.
I've tried also with ssh but at the moment does not work, login problems (I dont know if I can create public and private keys on switch).
Any suggestion is welcome.

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