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參數(shù)資料
| 型號： | RTL8308B |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | REALTEK SINGLE CHIP 8-PORT 10/100 ETHERNET SWITCH CONTROLLER WITH EMBEDDED MEMORY |
| 中文描述： | 瑞昱單片8端口10/100以太網(wǎng)交換機控制器，嵌入式存儲器 |
| 文件頁數(shù)： | 14/28頁 |
| 文件大小： | 397K |
| 代理商： | RTL8308B |
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RTL8308B
2002/01/23
Rev. 2.0
14
The RTL8308B address table contains both the static addresses input by the CPU or the EEPROM and
dynamically learned address. It learns the individual MAC addresses from 3 different sources.
1. Packet received with no errors from the local ports.
2. Packets forwarded from other devices through the ring to the device
3. The Table Convergence message received from the ring, which is not issued by the device itself.
If a received packet contains a source address that has already been learned in another port’s address table but not
aged out, it will perform the following operation based on the switch’s configuration.
If the security option is selected for the port, RTL8308B will consider this as a security violation. If port is a
nonprotected port, RTL8308B will delete the SA from the previous port’s address table and update it to the current
port’s address table. However, if the SA is an static address entry, the address will not be updated.
6.7 Address Hashing Mode
On reception of a packet, the RTL8308B first hashes the destination MAC address to get a location index to the
8K-entry hash table At the same time, it compares the destination MAC address with the contents of the 128 entry
CAM. If the hash indexed location is valid or the CAM comparison matches, this received packet will be
forwarded to the corresponding destination port. Otherwise, the RTL8308B broadcasts the packet. Next, the
RTL8308B hashes the source MAC address to get a location index to the hash table. If the hash indexed location is
occupied, i.e., a hash collision has occurred, the new source MAC address will be relocated into the 128 entry
CAM accordingly. Using this eliminates the hash collision problem.
6.8 Address Direct Mapping Mode
In this mode, the RTL8308B uses the last 13 bits of the MAC address to index to the 8K-entry look-up table.
6.9 Frame Filtering
The RTL8308B will make filtering and forwarding decisions for each packet received based on its packet routing
table, VLAN Mapping, port state, and the system configuration.
Received frames will be filtered under the following conditions:
1. The RTL8308B will check all received frames for errors such as symbol error, FCS error, short event, runt, long
event, etc. Frames with any kind of error will not be forwarded to their destination port.
2. Any frame heading to its own source port will be filtered.
3. Packets heading to a disabled receiving port will be filtered.
4. If the input buffer of the port is full, the incoming frame will be discarded. It is recommended to use flow control
to prevent any loss of data. If the flow control option is enabled, this event will not occur. The remote station
will transmit a frame when the input buffer becomes available.
5. If the packet has any security violation and security option is enabled at the receiving port
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PDF描述 |
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| RTL8309SB | SINGLE-CHIP 9-PORT 10/100MBPS SWITCH CONTROLLER |
| RTS0072 | VOICE CHANGER |
| RTS0072B | VOICE CHANGER |
| RU4D | SDR Cable Assembly; Connector Type A:micro D Ribbon Plug; Connector Type B:micro D Ribbon Plug; Cable Length:2m; No. of Contacts:26; Pitch Spacing:0.8mm RoHS Compliant: Yes |
| RU4D | Damper Diodes (For Display) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
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| RTL8309SB | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:SINGLE-CHIP 9-PORT 10/100MBPS SWITCH CONTROLLER |
| RTL8309SB-LF | 制造商:Realtek Semiconductor 功能描述:RTL8309 Series 9 Port 10/100 Mbps Ethernet Switch Controller - PQFP-128 制造商:Realtek 功能描述:RTL8309 Series 9 Port 10/100 Mbps Ethernet Switch Controller - PQFP-128 |
| RTL8316 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Specifications |
| RTL8363S-GR | 制造商:Realtek Semiconductor 功能描述: |
| RTL8801 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Specifications |
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