D-Link DGS-3204 - Switch - EN 100VG-AnyLAN, User Manual

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Gigabit Ethernet Switch User’s Guide
22 Switch Management
Packet Forwarding
The Switch looks at the network configuration to forward
packets. This reduces the traffic congestion on the network,
because packets,
instead of being transmitted to all
segments, are transmitted to the destination only.
Example: if Port 1 receives a packet destined for Port 2,
the Switch transmits that packet through Port 2 only, and
transmits nothing through Port 1.
♦
Filtering Database A Switch filters frames, i.e., does
not relay frames received by a Switch Port to other
Ports on that Switch, in order to prevent the
duplication of frames. Frames transmitted between a
pair of end stations can be confined to LANs that form
a path between those end stations.
The functions that support the use and maintenance
of filtering database information are:
1. Permanent configuration of reserved addresses.
2. Explicit configuration of static filtering information.
3. Automatic learning of dynamic filtering information
through observation of Switched Local Area Network
traffic.
4. Aging out of filtering information that has been
automatically learned.
5. Calculation and configuration of Switched Local Area
Network topology.