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| ERROR_IPSEC_IKE_QM_ACQUIRE_DROP | ERROR_IPSEC_IKE_QUEUE_DROP_NO_MM |
ERROR_IPSEC_IKE_QUEUE_DROP_MM
ERROR_IPSEC_IKE_QUEUE_DROP_MM identifies a queue-delay drop in the Main Mode portion of IKE. Main Mode creates the authenticated secure channel that Quick Mode later uses for traffic protection.
What to check
- Check peer reachability and Main Mode audit events before focusing on application traffic.
- Investigate repeated negotiation storms, policy churn, or system resource pressure.
- Use a simultaneous trace on both endpoints to distinguish local queuing from peer non-response.
Microsoft: Audit IPsec Main Mode
Microsoft: Get-NetIPsecMainModeSA
Microsoft: Use Netsh to manage network traces
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