3 fc common transport, Fc common transport – Seagate Fibre Channel Interface User Manual
Page 111
Fibre Channel Interface Manual, Rev. D
97
9.3
FC common transport
FC common transport (CT) provides a transport for service applications such as the fabric name server. The
type of FC common transport service is identified by the command code in the third word of the payload. The
R_CTL field of the frame header identifies whether the common transport service is a request or a response to
a request. The response for a common transport service varies with the function. A description of the accept
for each request is included with the description of the request.
Table 54:
Common transport header
Bit
Byte
7
6
5
4
3
2
1
0
0
0
0
0
0
0
0
1
0
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
1
0
0
0
0
0
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)