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HNS_PORT_NOT_FOUND
HNS_PORT_NOT_FOUND is an HRESULT used by Windows Host Networking Service (HNS). It indicates that the expected vSwitch port is missing, usually because its endpoint or switch changed.
What to check for HNS_PORT_NOT_FOUND
- Verify that the endpoint is still attached to the expected virtual switch.
- Inspect vSwitch and HNS endpoint state before applying port-specific settings or policies.
- Avoid retaining port identifiers after the endpoint or host network has been recreated.
For HNS_PORT_NOT_FOUND, Microsoft documentation on Windows container networking and HNS
Diagnostic interpretation of HNS_PORT_NOT_FOUND
HNS_PORT_NOT_FOUND has the HRESULT value 0xC03B0007. AllStat records the condition as “The switch-port was not found.”. For HNS_PORT_NOT_FOUND, in practice, interpret that wording at the boundary owned by the Windows component or COM interface that returned the HRESULT, rather than treating the value as a generic Windows message.
Evidence to capture for HNS_PORT_NOT_FOUND
- Record the exact COM method or Windows API, its input object, the calling thread, and the full 0xC03B0007 value before a wrapper converts it to an exception or Boolean result.
- Capture any IErrorInfo text, activity identifier, event-log entry, and subsystem trace that mentions HNS_PORT_NOT_FOUND or the hns / port / found operation.
- Reproduce HNS_PORT_NOT_FOUND with the smallest valid input and note whether the result changes with identity, architecture, service state, or target object.
Retry and recovery for HNS_PORT_NOT_FOUND
Retry HNS_PORT_NOT_FOUND only when the owning API documents a transient state or after the condition described as “The switch-port was not found.” has changed. For HNS_PORT_NOT_FOUND, configuration, policy, format, and authorization failures normally require correction first; an immediate loop can hide the original call site and add secondary errors.
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