H3C Technologies H3C WX3000E Series Wireless Switches - Manual (Page 135)

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VLAN configuration
Overview
Ethernet is a network technology based on the Carrier Sense Multiple Access/Collision Detect
(CSMA/CD) mechanism. As the medium is shared, collisions and excessive broadcasts are common on
an Ethernet. To address the issue, virtual LAN (VLAN) was introduced to break a LAN down into separate
VLANs. VLANs are isolated from each other at Layer 2. A VLAN is a bridging domain, and all broadcast
traffic is contained within it, as shown in Figure 111 .
Figure 111 A VLAN diagram
You can implement VLANs based on a variety of criteria. The web interface, however, is available only
for port-based VLANs, which group VLAN members by port. A port forwards traffic for a VLAN only after
it is assigned to the VLAN.
NOTE:
For more information about VLAN, see H3C WX3000E Series Wireless Switches Switching Engine
Configuration Guide.
Recommended configuration procedure
Use one of the following two approaches or combine the following two approaches to configure a
VLAN:
• Approach I: modify a VLAN, as shown in Table 40 .
• Approach II: modify a port, as shown in Table 41 .