Hi All,
How do I trigger the failover on the second hacmp server?
Please give me idea and I will do the rest.
Thanks,
itik
Failover can be triggered by anything as unplugging a network interface cable to one of the nodes. 
Do anything which interrupts the service of the primary server. Put to the extreme: rip out the power chord of the primary server.
Still there are less physical approaches to that. Here are some (non-destructive) possibilities ordered by velocity of the shutdown process:
"shutdown -F now"
"halt" / "halt -q"
"cat /etc/hosts > /dev/kmem"
Of course you can use the SMITty menu to initiate a "graceful takeover". This would leave the primary server even running.
I hope this helps.
bakunin