LTM irule same irule got called by multiple tmm instances

Another improvement is to create a dns pool containing pool dns servers and monitored with a dns monitor.

Then use this code

when CLIENT_ACCEPTED {
        foreach dns [active_members -list p_dns] {   
         Check if the first list element was empty
        if {[set dest [lindex [RESOLV::lookup @[lindex $dns 0] -a "www.abc.com";] 0]] ne ""} {
             Set Node IP based on DNS resolution
            node $dest 443
            break
        }
    }
}    

This code will request only dns active members based on the pool member status.