Symptoms

As a result of a known issue connection mirroring for long lasting connections may not recover correctly after the HA mirroring channel flaps and a failover occurs. The new standby unit after the failover may expire the flow after the idle timeout.

Impact

The new standby unit may expire the pre-existing flow.

Conditions

L4 connection mirroring with long lasting connections during for the entire event as follows: - A working HA channel flaps due to some event. - After recovery of the HA channel there is a failover of the active unit to standby, without loss of the mirroring connection (e.g., administrative failover).

Workaround

None

Fix Information

L4 connection mirroring continues to update the idle timer on the standby unit after an HA channel flap and failover.

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips