Cisco ASA Audit Event: 105511

105511: Incomplete read of message header from peer unit

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-3-105511: (Primary|Secondary) Incomplete read of message header of message from peer unit peer-ip: bytes bytes read of expected header_length header bytes.

Event 105511 is generated when the message header from the peer unit is incompletely read. The IP address of the peer unit, the number of bytes read, and the length of the message header are specified in the message. 

How could you resolve this situation?

If the error was not caused by the failure of the peer unit, collect details about the events leading up to the error and contact Cisco TAC.

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