Pool to pool failover

There isn't a way to check the state of one pool and select a different pool in an iRule in 4.x. You can get similar functionality using priority groups. You can check SOL2423 for details "Overview of priority load balancing" (Click here).

 

 

You could also send an HTTP redirect if the pool is down:

 

 

SOL7051: Configuring the BIG-IP system to use an alternate server if pool members are unavailable (Click here)

 

 

Aaron