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STATUS_TOO_MANY_COMMANDS
The legacy NetBIOS command window is exhausted
This error reports a limit in the old Network BIOS command model, not a general shortage of CPU or memory. The adapter or protocol implementation has reached the number of outstanding commands it can track for the current workload.
The immediate action is to reduce concurrency and determine whether commands are completing. A permanently full window can indicate lost completions, a hung adapter path, or obsolete software tuned for a different NetBIOS implementation. Increasing unrelated SMB limits will not necessarily affect this queue.
What to inspect
- Measure outstanding NetBIOS commands and their completion latency.
- Look for requests that never complete after adapter or link errors.
- Reduce request parallelism or migrate the workload away from the legacy interface.
References
- Microsoft Open Specifications: WKSTA_TRANSPORT_INFO_0
- Microsoft Open Specifications: CIFS Browser glossary
- Microsoft Open Specifications: NTSTATUS values
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