iSER Draft Status. draft-ietf-ips-iser-01 Mike Ko March 8, 2005. Declared Limit to Control the Number of Unexpected PDUs.
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Similarly, for a NOP-in PDU with ITT = TTT = 0xffffffff and StatSN = x, the PDU is outstanding until the initiator responds with a control-type PDU on the same connection where ExpStatSN is at least x+1
An implementation note was also added which recommended that “To avoid complexity, a NOP-in PDU with TTT /= 0xffffffff can be used instead”
Section 6.7 was added to describe a new key, MaxOutstandingUnexpectedPDUs, which allows both the initiator and the target to declare the maximum number of outstanding “unexpected” control-type PDUs it can receive
Last paragraph in section 7.3.4 was modified to clarify that SCSI Data-out is not used for solicited data since an R2T is always transformed into an RDMA Read Request
Section 8.3 and 8.4 were added to describe the buffering requirements for the expected and unexpected control-type PDUs and when these PDUs are no longer outstanding
Described the use of the MaxOutstandingUnexpectedPDUs key
Added an implementation note to suggest using NOP-in and NOP-out as ping request and ping response to avoid complexity