Hi,
First make sure that the VIP only replies on ICMP when it is actually active (when there is at least one rserver in the serverfarm).
-> loadbalance vip icmp-reply active
Then, if you want to gracefully bring it down, suspend you rservers in your serverfarm. When they are all down, the VIP stops replying to ICMP.
Once everything is down, start by removing everyting in opposit order like you created it.
HTH,
Dario