ERROR_IPSEC_IKE_PEER_MM_ASSUMED_INVALID - 13886 (0x363E)
Main mode SA assumed to be invalid because peer stopped responding.
Updated: Feb 21, 2026
Technical Meaning
The error code ERROR_IPSEC_IKE_PEER_MM_ASSUMED_INVALID (13886, 0x363E) indicates that the main mode Security Association (SA) was assumed to be invalid due to a lack of response from the peer during an IPsec/IKE negotiation process. This typically occurs when the local system expects a response from the remote peer but does not receive it within the expected timeframe.
Error Details
This error is specific to the Internet Key Exchange (IKE) protocol, which is used for establishing and managing Security Associations in IPsec. The main mode of IKE negotiation involves an exchange of messages between two peers to establish a secure connection. If the local system does not receive a response from the peer within the expected timeframe, it assumes that the SA is invalid.
Usage Context
This error can occur during the establishment or maintenance of IPsec connections. It may be encountered in scenarios where network conditions are poor, or there might be issues with the remote peer's configuration or availability.
Developer Interpretation
Developers should interpret this error as an indication that a critical component of the IPsec/IKE negotiation process has failed due to a lack of response from the peer. This can affect the reliability and security of the established connection, and it may lead to the termination of the Security Association or the initiation of re-negotiation attempts.
Related Errors
ERROR_IPSEC_IKE_SA_REKEYED(13902, 0x365A): Indicates that a new SA has been established after an existing one was assumed invalid due to a timeout.ERROR_IPSEC_IKE_PEER_MM_NO_RESPONSE(13887, 0x363F): Similar to this error but specifically indicates no response from the peer during main mode negotiation.
FAQ
Q: What does this error mean?
A: This error signifies that a main mode Security Association was assumed invalid due to a lack of response from the peer during an IPsec/IKE negotiation process.
Q: How can I troubleshoot this issue?
A: Review the network connectivity and ensure that both peers are operational. Check for any firewall or security policies that might be blocking necessary communications.
Summary
The ERROR_IPSEC_IKE_PEER_MM_ASSUMED_INVALID error is a specific indication of an IPsec/IKE negotiation failure due to a lack of response from the peer. Developers should handle this error by ensuring robust network conditions and proper configuration of both peers involved in the connection establishment process.