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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
76543210
000000010
R_CTL
1 (MSB)
D_ID2
3 (LSB)
400000000
Reserved
5 (MSB)
S_ID6
7 (LSB)
800100000
Type
9 (MSB)
F_CTL10
11 (LSB)
12
SEQ_ID
1300000000
DF_CTL
14 (MSB)
SEQ_CNT
15 (LSB)
16 (MSB)
OX_ID
17 (LSB)
1811111111
1911111111
RX_ID
20 (MSB)
Parameter
21
22
23 (LSB)