Symptoms

CGNAT PBA may log port-block allocation(LSN_PB_ALLOCATED) and immediately followed by a port-block release(LSN_PB_RELEASE) log message for a port-block which is already allocated to a different subscriber.

Impact

Causes ambiguity in reverse mapping subscriber connections

Conditions

This can happen if subscriber traffic is received when blade is being added/removed or when blade is failing or while HA failover is in progress

Workaround

None

Fix Information

CGNAT PBA does not log port-block allocation and port-block release log messages for a port-block which is already allocated to a different subscriber during a blade add/remove/fail/HA failover

Behavior Change