210020: LU PAT port reserve failed
Cisco ASA is a security device that provides the combined capabilities of a firewall, an antivirus, and an intrusion prevention system. It also facilitates virtual private network (VPN) connections. It helps to detect threats and stop attacks before they spread through the network.
Message: %ASA-3-210020:LU PAT port port reserve failed.
Event 210020 is generated when Stateful Failover is unable to allocate a specific PAT address that had been in use.
How could you resolve this situation?
Synchronize the Active unit system memory with the Standby unit using the 'write standby' command.