Seagate Fibre Channel Interface - Manual (Page 70)

56 Fibre Channel Interface Manual, Rev. D
9.2 Extended link services
The type of extended link service is identified by the LS Command Code in the first word of the payload. The
R_CTL field of the frame header identifies whether the extended link service is a request or a reply to a
request. The accept for extended link services varies with the function. A description of the accept for each
request is included with the description of the request.
Table 21: Extended link services header
Bit
Byte 7 6 5 4 3 2 1 0
0 0 0 1 0 0 0 1 X
R_CTL
1 (MSB)
D_ID 2
3 (LSB)
4 0 0 0 0 0 0 0 0
Reserved
5 (MSB) S_ID
6
7 (LSB)
8 0 0 0 0 0 0 0 1
Type
9 (MSB)
F_CTL 10
11 (LSB)
12
SEQ_ID
13 0 0 0 0 0 0 0 0
DF_CTL
14 (MSB)
SEQ_CNT
15 (LSB)
16 (MSB) OX_ID
17 (LSB)
18 1 1 1 1 1 1 1 1
19 1 1 1 1 1 1 1 1
RX_ID
20 (MSB)
Parameter
21
22
23 (LSB)