I'm just going through some failover testing with a pair of ACE 4710 appliances configured as a fault tolerant pair and have noticed that it takes a while for my probes to start working correctly. To explain better:
- Reload the primary appliance
- Secondary appliance becomes active as expected
- Primary appliance comes back up and immediately becomes active again (preempt is enabled by default)
- HTTP probes on the primary fail for around 30 seconds before becoming successful (on first failover at point 2 above probes are fine)
We're running the latest code: Version A3(2.5).
Has anybody seen this behaviour before? I was thinking that a preempt delay would help here - but in the meantime I've disabled preempt on the ft groups so that I can manually switchover.