3Com 5500 SI - Switch - Stackable, Configuration Manual

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6
VLAN O
PERATION
This chapter covers the following topics:
■
VLAN Configuration
■
Voice VLAN Configuration
VLAN Configuration
This chapter describes how to configure a VLAN
VLAN Overview A virtual local area network (VLAN) creates logical groups of LAN devices into
segments to implement virtual workgroups. IEEE issued the IEEE 802.1Q in 1999,
which was intended to standardize VLAN implementation solutions.
Using VLAN technology, you can logically divide the physical LAN into different
broadcast domains. Every VLAN contains a group of workstations with the same
demands. However, the workstations of a VLAN do not have to belong to the same
physical LAN segment.
Within a VLAN, broadcast and unicast traffic is not forwarded to other VLANs.
Therefore, VLAN configurations are very helpful in controlling network traffic, saving
device investment, simplifying network management and improving security.
Configuring a VLAN VLAN configuration is described in the following sections:
■
Creating/Deleting a VLAN
■
Adding Ethernet Ports to a VLAN
■
Setting/Deleting a VLAN or VLAN Interface Description Character String
■
Specifying/Removing the VLAN Interface
■
Shutting Down/Enabling the VLAN Interface
To configure a VLAN, first create a VLAN according to network requirements.
Creating/Deleting a VLAN
Use the following command to create/delete a VLAN. If the VLAN to be created exists,
enter the VLAN View directly. Otherwise, create the VLAN first, and then enter the
VLAN View.
Perform the following configurations in System View.
Note that the default VLAN, namely VLAN 1, cannot be deleted.
Table 79 Creating/Deleting a VLAN
Operation Command
Create a VLAN and enter the VLAN View
vlan vlan_id
Delete the specified VLAN
undo vlan
{
vlan_id
[
to vlan_id
] |
all
}