3com 5500-SI Manual Do Utilizador

This chapter covers the following topics:

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This chapter describes how to configure a VLAN

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:

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To configure a VLAN, first create a VLAN according to network requirements.

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

Create a VLAN and enter the VLAN View

Delete the specified VLAN 

 { vlan_id [ to vlan_id ] | all }