Planet Technology GSW-601S - Manual (Page 29)

GSW-601S User's Manual
29
4 SWITCH OPERATION
4.1 Address Table
The Switch is implemented with an address table. This
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 Switch.
4.2 Learning
When one packet comes in from any port, the Switch
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.
4.3 Forwarding & Filtering
When one packet comes from some port of the
Ethernet Switching, it will also check the destination
address besides the source address learning. The
Ethernet Switching will lookup 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