WSA_QOS_EFLOWSPEC - 11017 (0x2B09)
An invalid or inconsistent flowspec was found in the QOS structure.
Updated: Feb 21, 2026
Technical Meaning
The error code WSA_QOS_EFLOWSPEC (11017, 0x2B09) is returned when an invalid or inconsistent flowspec is found in the Quality of Service (QoS) structure. This typically occurs during network operations that involve QoS settings.
Error Details
The flowspec parameter is used to specify traffic control policies for network packets. An invalid or inconsistent flowspec can lead to issues such as packet filtering, shaping, or marking not being applied correctly. The error indicates a problem with the configuration of these policies within the QoS structure.
Usage Context
This error code is relevant in scenarios where applications interact with the Windows Sockets API (WSA) for network operations that require Quality of Service settings. It can be encountered when setting up or modifying QoS rules, particularly when dealing with flowspec parameters.
Developer Interpretation
When encountering WSA_QOS_EFLOWSPEC, developers should verify the correctness and consistency of the flowspec values provided to the API functions. Common issues include incorrect parameter values, mismatched object types, or exceeding defined limits for QoS settings.
Related Errors
- WSA_QOS_EFLOWDESC (11018)
- WSA_QOS_EFILTERCOUNT (11020)
- WSA_QOS_ESUBSET (11023)
FAQ
What does WSA_QOS_EFLOWSPEC mean?
It indicates that an invalid or inconsistent flowspec was found in the QoS structure.
How can I resolve this error?
Review and correct the flowspec values provided to the API functions. Ensure they are valid and consistent with the expected parameters.
Summary
The WSA_QOS_EFLOWSPEC error code is a generic indication that there is an issue with the flowspec configuration in QoS settings. Developers should focus on validating the input parameters and ensuring their correctness to resolve this error.