Can we initiate failover of Big-ip that is clustered from Big-IQ? how to do if it is possible?
I don't believe you can do that directly from BIG-IQ, but you could SSH from your BIG-IQ to an active device in an HA pair.
Once you connect using SSH to the active device, from in bash issue the following command:
tmsh run /sys failover standby
HERE is a lot of good info on failover.
Hope that helps! If it does please up-vote and select this answer, it'd be greatly appreciated!
Thanks Dylan.Will check this information.