InfiniBand Network Architecture

RQ Logic's Error Detecting and Handling

Table 17-7 on this page defines the types of errors that can be detected by the RQ Logic and how each is handled.

Table 17-7. RC RQ Logic Error Types and Handling

Error	Description	Handling
Out of sequence request packet	PSN of the inbound request packet does not match the QP's RQ Logic's ePSN.	Class B error handling: Return an PSN Sequence Error Nak to the remote QP's SQ Logic. No other action is taken.
Malformed RQ WQE	Responder detected a malformed RQ WQE while processing an inbound Send or RDMA Write With immediate request packet.	Class A error handling: Remote Operational Error Nak returned. Destination QP transitions to the Error state. Destination QP's RQ WQE is retired and an error CQE is created indicating ...