3Com SuperStack 4 Configuration Manual page 53

3
VLAN Configuration
VLAN Overview
VLAN Configuartion
VLAN O
PERATION
This chapter covers the following topics:
VLAN Configuration
■
Voice VLAN Configuration
■
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.
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.
Table 52 Creating/Deleting a VLAN
Operation
Create a VLAN and enter the VLAN View
Command
vlan_id
vlan