參數(shù)資料
型號: 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): 31/152頁
文件大小: 2390K
代理商: IBM3209K3114
IBM3209K3114
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IBM Packet Routing Switch Serial Interface Converter
prssi.01
July 12, 2000
Functional Description
Page 21 of 142
3.3.4.1 Building the Egress Packet Qualifier Byte
Shared Memory Information
- The bit PQ(2) is replaced by the shared memory information (SM) whose priority level corresponds to
shared memory grant priority levels PQ(0) and PQ(1) that cycle one priority after another.
Output Queue Grant Priority Indicator
- The first two bits PQ(3) and PQ(4) are loaded from the Output Queue Grant Priority Level values.
- The other bits PQ(6) and PQ(7) are unchanged, as they belong to the data information contained in
the packet.
Table 8: 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
Shared Memory Grant Pri-
ority Level
Shared
Memory
Status
Hold =
0
Grant =
1
Output Queue Grant Pri-
ority Indicator
0
0
0
Memory Grant
Priority Level
Definition
Highest
0
0
Medium High
0
1
Medium Low
1
0
Lowest
1
1
Output Queue Grant
Priority Indicator
Highest
0
0
Medium High
0
1
Medium Low
1
0
Lowest
1
1
Data Packet
Priority Bit
Highest
0
0
Medium High
0
1
Medium Low
1
0
Lowest
1
1
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