Switch Operation
Address Table
The 16/24-port Ethernet Switching is implemented with an
address table. The address table composed of many entries.
Each entry is used to store the address information of some
node in network, including MAC address, port no, etc. This
information comes from the learning process of Ethernet
Switching.
Learning
When one packet comes in from any port. The Ethernet
Switching will record the source address, port no. And the
other related information in address table. This information
will be used to decide either forwarding or filtering for
future packets.
Forwarding
＆
” Filtering
When one packet comes from some port of the Ethernet
Switching, it will also check the destination address besides
the source address leaning. The Ethernet Switching will look
up the address-table for the destination address. If not found ,
this packet will be forwarded to all the other ports except the
port which this packet comes in . And these ports will transmit
this packet to the network it connected, If found, and the
destination address is located at different port from this packet
comes in, the Ethernet Switching will forward this packet to
the port where this destination address is located according to
the information from address table. But , if the destination
address is located at the same port with this packet comes
in ,then this packet will be filtered .Thereby increasing the
network throughput and availability
