I know certain load balancers which have priority based pool member activation for e.g. the server farm has two rservers. And all the traffic is sent to Rserver1, even though Rserver2 is live.
The traffic is forwarded to Rserver2 only when Rserver1 is down.
Is this possible with Cisco ACE ?
Yes this is possible. Use the backup-rserver option.
serverfarm host SF-App