| Previous | Next |
| STATUS_NDIS_NOT_SUPPORTED | STATUS_NDIS_OFFLOAD_CONNECTION_REJECTED |
STATUS_NDIS_OFFLOAD_POLICY
Policy prevents this TCP connection from being offloaded
STATUS_NDIS_OFFLOAD_POLICY is a TCP Chimney offload decision. TCP Chimney moves TCP/IP processing for a connection from the host networking stack to capable adapter hardware, but it works only when the operating system, the network adapter, and the connection policy allow it. Microsoft now marks the TCP Chimney driver interface as deprecated, so this status is mostly relevant to older drivers and systems.
The important clue is that the connection was rejected by policy, not by ordinary reachability. Check OS offload settings, NIC advanced properties, group policy or vendor policy, and the offload capability advertised by the adapter before blaming packet loss.
Evidence that narrows it
- Record host TCP Chimney settings and adapter offload capabilities at the time of the request.
- Confirm whether the driver is using deprecated Chimney interfaces or newer offload mechanisms.
- Compare with target/path rejection, which means the offload path evaluated the connection but refused it for different reasons.
References
- Microsoft: TCP Chimney Offload overview
- Microsoft: NDIS_TCP_CONNECTION_OFFLOAD_PARAMETERS
- Microsoft: NDIS_PROTOCOL_OFFLOAD_BLOCK_LIST
- Microsoft: MS-ERREF NTSTATUS values
Looking for a different code? Search another status or error code.