參數(shù)資料
型號: LSIFC929
英文描述: LSIFC929 dual channel fibre solutions
中文描述: LSIFC929雙通道光纖解決方案
文件頁數(shù): 23/144頁
文件大小: 1496K
代理商: LSIFC929
Frames
2-3
frames through the Sequence and Exchange constructs. The framing
protocol creates the constructs necessary to form frames with the data
being packetized within each frame’s payload.
The FC-3 layer defines a set of services that are common across multiple
ports of a node (see
Section 2.5, “FC Ports,” page 2-7
). All of these
services allow a single port or fabric to communicate to several N_Ports
at one time. For more information regarding the FC-3 layer, please
consult the most current version of FC-PH.
The top layer defined in FC is the FC-4 layer. The FC-4 layer provides a
seamless integration of existing standards. It specifies the mapping of
ULPs to the layers below. Some of these ULPs include SCSI and IP.
Each of these ULPs is defined in its own ANSI document.
2.3 Frames
There are two types of frames used in FC: Link Control frames and Data
frames. Link Control frames contain no payload and are flow control
responses to Data frames. An example of a Link Control frame
(
Figure 2.2
) is the ACK frame.
Figure 2.2
Link Control Frame
Start
of
Frame
(4)
Frame
Header
(24)
CRC
(4)
End
of
Frame
(4)
( ) = Number of Bytes
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