Sending requests to specific URI to different pool based on load

If snmp threshold is tripped, PoolA fails over to node3. Would this work? you mean when normal, only node1 and node2 (in pool A) handle traffic but when their cpu utilization reaches threshold, you want they are marked down and node3 handle traffic instead, don't you?

 

 

if so, yes it is possible by using priority group, i.e. 2 groups; one which is higher contains node1 and node2 and the other group has only node3, and external health monitor to do snmp polling cpu utilization on node1 and node2.