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參數(shù)資料
| 型號： | 9880 |
| 廠商： | Intel Corp. |
| 英文描述： | Advanced 10/100 Repeater with Intergrated Management |
| 中文描述： | 高級10/100中繼器與綜合管理 |
| 文件頁數(shù)： | 99/118頁 |
| 文件大?。?/td> | 1648K |
| 代理商： | 9880 |
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Advanced 10/100 Repeater with Integrated Management
—
LXT9860/9880
Datasheet
Document #: 248987
Revision#: 003
Rev Date: 08/07/01
99
6.3
Ethernet Address Registers
All Ethernet address registers consist of two 32-bit registers that together contain a 48-bit Ethernet
address. Address values are unknown on power up.
6.3.1
Port Address Registers
The port address register set is described in
Table 50
. The tracking registers continuously monitor
the source addresses of packets emanating from the corresponding ports. The authorized address
registers can be used for security functions.
6.3.2
Search Address Registers
The LXT98x0 offers an on-board address search mechanism. Should the user wish to find out if a
particular source address has been seen on any of the ports, on any of the segments, this register
would be used. Each port within a LXT98x0 chip is checked for traffic originating from the source
address matching the Search Address register. If a match is found, the port number where the traffic
originated is saved, thus allowing software to determine where the address is located. The Search
Address Match register contains the port from the Search Address match function.
Table 49. Ethernet Address Register Bit Assignments
Upper Address
Bits 31:16 Reserved. Bits 15:0 contain bits 47:32 of the Ethernet Address.
Lower Address
Bits 31:0 contain bits 31:0 of the Ethernet Address.
Table 50. Port Address Tracking Registers
Name
Type
1
Port
Addr
2
Description
rptrAddrTrackNewLastSrcAddress
RW
1
2
3
4
5
6
7
8
9
10
0DA, 0DB
0DC, 0DD
0DE, 0DF
0E0, 0E1
0E2, 0E3
0E4, 0E5
0E6, 0E7
0E8, 0E9
0EA, 0EB
0EC, 0ED
Stores the value of the last Source Address
received. Attribute is 6 bytes long. Can also
act as NewLastSourceAddress via SW.
These addresses power up unknown, but
can be zeroed by software.
Example Address: 00-20-7B-03-02-01
First Read:
msb
037B2000
lsb
.
Second Read:
msb
XXXX0102
lsb
All addresses or address pairs must read in
order. Only the first read updates the holding
register. X
’
s are currently defined as zeros.
authorizedSourceAddress
R/W
1
2
3
4
5
6
7
8
0EE, 0EF
0F0, 0F1
0F2, 0F3
0F4, 0F5
0F6, 0F7
0F8, 0F9
0FA, 0FB
0FC, 0FD
Used for security address comparisons. An
auto learn mode is available. Typically, this
address matches:
rptrAddrTrackNewLastSrcAddress register.
These addresses power up unknown, but
can be zeroed by software.
1. R = Read only; W = Write only; R/W = Read/Write; LH = Latch High; LL = Latch Low; SC = Self Clearing.
2. All offset addresses are expressed in hex.
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