Acer HDS AMS200 Reference Manual page 327

Link Control Frames
Table D.8 displays the defined Link Control frames (FT-0) and supports Link Control
frames. The AMS200 supports link service frames shown in Table D.9.
Table D.8 Link Control Frames
No. Name
1 ACK_1 (Acknowledge_1)
2 ACK_0 (Acknowledge_0)
3 ACK_N (Acknowledge_N)
4 P_RJT (N_Port Reject)
5 F_RJT (Fabric Reject)
6 P_BSY (N_Port Busy)
7 F_BSY (Fabric Busy)
8 LCR (Link Credit Reset)
Note: Support for the ACK_1 is given in the limited case where the PLOGI of the Class 2
is used.
Data Frames
The Data frames defined include:
FC-4 Device_Data is a frame which is used by the protocol prescribed by upper
–
levels. (FCP Information Unit, etc.)
FC-4 Video_Data is not supported by this equipment.
–
Link_Data defines link services.
–
Meaning
Indicates that a single Data frame is being acknowledged.
Indicates that all Data frames of a Sequence are being acknowledged.
Indicates that N consecutive Data frames of a Sequence are being
acknowledged.
Indicates that delivery of a frame is being denied.
A four byte reject action and reason code is contained in the
Parameter field.
Indicates that delivery of a frame is being denied.
A four byte reject action and reason code is contained in the
Parameter field.
Indicates that the responding N_Port is temporarily occupied with
other link activity and is not able to accept the frame.
A reason code is contained in the Parameter field.
Indicates that the fabric or the destination N_Port is
temporarily occupied with other link activity and the fabric is unable to
deliver the frame. A reason code is contained in bits 31-28 of the
TYPE field.
Indicates that the N_Port specified by the S_ID requests that the
N_Port specified by the D_ID reset any buffers containing Data frames
from the S_ID in order to allow the S_ID to reset its end-to-end Credit
to its Login value.
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