Switch Operation; Address Table; Learning; Forwarding & Filtering - Planet Networking & Communication IGS-6329 Series User Manual

5. SWITCH OPERATION

5.1 Address Table

The Managed Switch is implemented with an address table. This address table is composed of many entries. Each entry is
used to store the address information of some nodes in the network, including MAC address, port no, etc. This information
comes from the learning process of Managed Switch.

5.2 Learning

When one packet comes in from any port, the Managed 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.
5.3 Forwarding & Filtering
When one packet comes from some port of the Managed Switch, it will also check the destination address besides the source
address learning. The Managed Switch 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 a different port from this packet comes in, the Managed
Switch 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.
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