參數(shù)資料
型號: ADM6926
廠商: Electronic Theatre Controls, Inc.
英文描述: 26 port 10/100 Mbps Ethernet Switch Controller
中文描述: 26端口10/100 Mbps以太網(wǎng)交換機控制器
文件頁數(shù): 18/85頁
文件大?。?/td> 4222K
代理商: ADM6926
ADM6926
Function Description
SA+VID was found in the address table, then aging value of each corresponding entry
will be reset to 0.
Dynamic learning will be disabled in the following condition:
(1)
Security violation happened.
(2)
The packet is a PAUSE frame.
(3)
The first bit of SA is 1’b1.
(4)
The packet is an error packet (too long, too short or FCS error).
(5)
the switch not to learn the packet.
The CPU port leaning function is disabled or enabled but the CPU port instructs
(6)
Protocol.
The port is in the Disabled or Blocking-not-Listening state in the Spanning Tree
2. Manual Learning
The ADM6926 implements the manual learning through the CPU’s help. The CPU can
create or remove any entry in the address table. Each entry could be static or pointed to
the output port map table. “Static” means the entry will not be aged forever. It is useful in
the security function (forward unknown packets to the CPU port or discard) or monitor
function (forward monitored address to the specific port). Output port map table is also
helpful in the IGMP function (if the number of the output port is more than one) or the
users want to redirect the special packets with reserved DA.
3.1.3 Address Aging
The ADM6926 will periodically (300ms) remove the non-static address in the address
table. This could help to prevent a station leaves the network and occupies a table space
for a long time. Aging function can be disabled from the hardware pin.
ADMtek Inc.
3-2
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