參數(shù)資料
型號(hào): IBM32NPR100EXXCAB133
英文描述: Microprocessor
中文描述: 微處理器
文件頁數(shù): 29/131頁
文件大?。?/td> 1679K
代理商: IBM32NPR100EXXCAB133
PRS28.4G
IBM Packet Routing Switch
prs28.03.fm
August 31, 2000
Functional Description
Page 29 of 131
3.1.2.4 Logical Unit Lengths
As mentioned previously, an LU is the part of a packet transported over one 0.8Gb/s stream. The table below
lists, for all speed expansion modes, all possible LU lengths and their corresponding packet lengths, as well
as the total packet buffering provided.
All packets received and transmitted by the switch have the same length.
Table 3: Packet Length and Logical Unit Length
Speed Expansion Mode
Switch Configuration
Gb/s Per Port
Packet Length
(Bytes)
LU Size
(Bytes)
Total Buffering
(packets)
Single device, no internal speed
expansion
16 x 16
1.77
64
68
72
76
80
32
34
36
38
40
256
Single device, with internal speed
expansion
8 x 8
3.54
64
68
72
76
80
16
17
18
19
20
256
Two devices speed expanded, no
internal speed expansion
16 x 16
3.54
64
68
72
76
80
16
17
18
19
20
512
Two devices speed expanded, no
internal speed expansion
16 x 16
3.54
128
136
144
152
160
32
34
36
38
40
256
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