123
4.4.7 VLAN Configuration
A Virtual Local Area Network (VLAN) is a network topology configured according to a logical
scheme rather than the physical layout. VLAN can be used to combine any collections of
LAN segments into a group that appears as a single LAN. VLAN also logically segments the
network into different broadcast domains. All broadcast, multicast, and unknown packets
entering the Switch on a particular VLAN will only be forwarded to the stations or ports that
are members of that VLAN.
VLAN can enhance performance by conserving bandwidth and improve security by limiting
traffic to specific domains. A VLAN is a collection of end nodes grouped by logics instead of
physical locations. End nodes that frequently communicate with each other are assigned to
the same VLAN, no matter where they are physically located on the network. Another
benefit of VLAN is that you can change the network topology without physically moving
stations or changing cable connections. Stations can be „moved‟ to another VLAN and thus
communicate with its members and share its resources, simply by changing the port VLAN
settings from one VLAN to another. This allows VLAN to accommodate network moves,
changes and additions with the greatest flexibility.
4.4.7.1 Port-Based VLAN
Port-based VLAN can effectively segment one network into several broadcast domains.
Broadcast, multicast and unknown packets will be limited to within the VLAN. Port-Based
VLAN is uncomplicated and fairly rigid in implementation and is useful for network
administrators who wish to quickly and easily set up VLAN so as to isolate the effect of
broadcast packets on their network.
The following screen page appears when you choose
Port-Based VLAN
mode and then
select
Configure VLAN
.
Содержание FOS-3124 SERIES
Страница 202: ...202 Restart DHCP service ...