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InfiniBand Network Architecture by MindShare, Inc., Tom Shanley

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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
ErrorDescriptionHandling
Out of sequence request packetPSN 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 WQEResponder 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 ...

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