63
2.13
VLAN
A
V
irtual
L
ocal
A
rea
N
etwork (
VLAN
) is a group of devices that can be located anywhere on a
network, but all devices in the group are logically connected together. In other words, VLAN allows
end stations to be grouped together even if they are not located on the same network switch. With a
traditional network, users usually spend a lot of time on devices relocations, but a VLAN
reconfiguration can be performed entirely through software. Also, VLAN provides extra security
because devices within a VLAN group can only communicate with other devices in the same group.
For the same reason, VLAN can help to control network traffic. Traditional network broadcasts data to
all devices, no matter whether they need it or not. By allowing a member to receive data only from
other members in the same VLAN group, VLAN avoids broadcasting and increases traffic efficiency
(see
Figure 2.75
).
Figure 2.75 Example of VLAN configuration
There are two common approaches to assigning VLAN memberships, as follow
Port-based VLAN
Tagging-based (802.1q) VLAN
2.13.1
VLAN Mode
Port-Based VLAN
(or Static VLAN equivalently) assignments are created by assigning ports to a
VLAN. If a device is connected to a certain port, the device will be assigned a VLAN to that specific
Summary of Contents for EH7506
Page 35: ...29 Figure 2 40 Mapping Table of DSCP ECN page...
Page 53: ...47 2 9 1 GVRP Settings Figure 2 62 GVRP setting page...
Page 55: ...49 2 9 2 GMRP Settings Figure 2 63 GMRP setting page...
Page 76: ...70...
Page 90: ...84 Figure 2 97 iA Ring Example Topology...
Page 98: ...92 Management Address Indicates neighbor s management IP address...
Page 110: ...104 Figure 2 115 Reboot page...
Page 117: ...111...
