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參數(shù)資料
| 型號(hào)： | VT6516 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | 16/12 PORT 10/1000 ASE T/TX |
| 中文描述： | 16/12港口10/1000日月光噸/德克薩斯州 |
| 文件頁數(shù)： | 52/73頁 |
| 文件大?。?/td> | 440K |
| 代理商： | VT6516 |
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VIA Technologies, Inc.
Preliminary VT6516 Datarsheet
-
52-
20H
spanning tree state for PORT 0
2’b00 – blocking state (default)
2’b01 – listening state
2’b10 - learning state
2’b11 – forwarding state
The forwarding operation in each Ethernet port is controlled by its
associated spanning tree state.
In blocking or listening state, the incoming packets will not trigger
any DMAC lookup operation and SMAC learning operation.
In learning state, the incoming packets will not trigger DMAC
lookup operation, but the SMAC learning operation will be
triggered for CRC-OK packets.
Only in forwarding state, an incoming packet will trigger DMAC
lookup operation while the first 24 bytes are received, and it will
trigger the SMAC learning operation while the whole packet is
received with good CRC.
For the 802.1d spanning tree algorithm, a blocked port for loop
avoidance should enter the blocking state so that any incoming
packets are filtered without forward. A normal port that does not
cause any loop should be in the forwarding state.
spanning tree state for PORT 1
PORT0_STP_
STATE
[1:0]
0
R/W
21H
PORT1_STP_
STATE
PORT2_STP_
STATE
PORT3_STP_
STATE
PORT4_STP_
STATE
PORT5_STP_
STATE
PORT6_STP_
STATE
PORT7_STP_
STATE
PORT8_STP_
STATE
PORT9_STP_
STATE
PORT10_STP
_STATE
PORT11_STP
_STATE
PORT12_STP
_STATE
PORT13_STP
_STATE
PORT14_STP
_STATE
PORT15_STP
_STATE
PORT0_VID
[1:0]
0
R/W
22H
spanning tree state for PORT 2
[1:0]
0
R/W
23H
spanning tree state for PORT 3
[1:0]
0
R/W
24H
spanning tree state for PORT 4
[1:0]
0
R/W
25H
spanning tree state for PORT 5
[1:0]
0
R/W
26H
spanning tree state for PORT 6
[1:0]
0
R/W
27H
spanning tree state for PORT 7
[1:0]
0
R/W
28H
spanning tree state for PORT 8
[1:0]
0
R/W
29H
spanning tree state for PORT 9
[1:0]
0
R/W
2AH
spanning tree state for PORT 10
[1:0]
0
R/W
2BH
spanning tree state for PORT 11
[1:0]
0
R/W
2CH
spanning tree state for PORT 12
[1:0]
0
R/W
2DH
spanning tree state for PORT 13
[1:0]
0
R/W
2EH
spanning tree state for PORT 14
[1:0]
0
R/W
2FH
spanning tree state for PORT 15
[1:0]
0
R/W
80H
port 0 VLAN ID
The VLAN feature is enabled only when all port VID's are
configured to a valid (non-zero) VID.
port 1 VLAN ID
port 2 VLAN ID
port 3 VLAN ID
port 4 VLAN ID
[5:0]
0
R/W
82H
84H
86H
88H
PORT1_VID [5:0]
PORT2_VID [5:0]
PORT3_VID [5:0]
PORT4_VID [5:0]
0
0
0
0
R/W
R/W
R/W
R/W
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