參數(shù)資料
型號(hào): IBM3209K3114
廠商: IBM Microeletronics
英文描述: IBM Packet Routing Switch Serial Interface Converter(IBM封裝路線選擇開關(guān)串行接口轉(zhuǎn)換器)
中文描述: IBM的分組路由交換機(jī)串行接口轉(zhuǎn)換器(IBM的封裝路線選擇開關(guān)串行接口轉(zhuǎn)換器)
文件頁數(shù): 32/152頁
文件大?。?/td> 2390K
代理商: IBM3209K3114
IBM3209K3114
IBM Packet Routing Switch Serial Interface Converter
Advance
Functional Description
Page 22 of 142
prssi.01
July 12, 2000
Output Queue Grant Bytes Description
- The IBM Packet Routing Switch Serial Interface Converter egress block provides the OQG values.
There are 16 or 32 bits for each priority.
- For the IBM 28.4 Packet Routing Switch, the first OQG sent is an idle packet
s priority level 00. The
OQG mechanism gives the priority level in the idle packet
s qualifier byte. The other OQGs are sent
in data packets (or idle packets) and the process is looped. In every idle packet sent, the flywheel
mechanism gives the priority level to check the position in the loop.
- The latest refreshed OQG bits are inserted into the packet header to be sent to the protocol engine.
Figure 14: IBM 28.4 Packet Routing Switch (switch) Packet Qualifier Bits Reshuffling
Table 9: Packet Qualifier for Egress Data Packet
Data Packet
Bit 31
Bit 30
Bit 29
Bit 28
Bit 27
Bit 26
Bit 25
Bit 24
Bit Meaning
0
Header
Parity
Color/Type
Color/Type
0
0
Packet Priority Bits
Color/Type
Red Complemented
0
1
Red
1
0
Blue
1
1
Packet Priority
Highest
0
0
Medium High
0
1
Medium Low
1
0
Lowest
1
1
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Switch
Packet
Qualifier
Protocol
Engine
Packet
Qualifier
Packet
Priority
Packet
Priority
SM
Priority
SM
Priority
SM Grant
Priority of
OQG
Priority of
OQG
Data / Idle
Packet
Priority
Packet
Priority
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Switch Notation
UTOPIA-3 Notation
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