Technical data

Acer | HDS AMS200 User and Reference Guide 307
 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 Meaning Support
1 ACK_1 (Acknowledge_1) Indicates that a single Data frame is being acknowledged. { (Note)
2 ACK_0 (Acknowledge_0) Indicates that all Data frames of a Sequence are being acknowledged. ×
3 ACK_N (Acknowledge_N) Indicates that N consecutive Data frames of a Sequence are being
acknowledged.
×
4 P_RJT (N_Port Reject) Indicates that delivery of a frame is being denied.
A four byte reject action and reason code is contained in the
Parameter field.
{
5 F_RJT (Fabric Reject) Indicates that delivery of a frame is being denied.
A four byte reject action and reason code is contained in the
Parameter field.
{
6 P_BSY (N_Port Busy) 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.
{
7 F_BSY (Fabric Busy) 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.
{
8 LCR (Link Credit Reset) 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.
{
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.