VLAN Group
VLAN Group Overview
A VLAN (Virtual Local Area Network) allows a physical network to be partitioned into multiple logical networks. Devices on a logical network belong to one group. A device can belong to more than one group. With VLAN, a device cannot directly talk to or hear from devices that are not in the same groups; the traffic must first go through a router.
Ports in the same VLAN group share the same frame broadcast domain thus increase network performance through reduced broadcast traffic. Shared resources such as a server can be used by all ports in the same VLAN as the server. Ports can belong to other VLAN groups too. VLAN groups can be modified at any time by adding, moving or changing ports without any re-cabling.
A tagged VLAN uses an explicit tag (VLAN ID) in the MAC header to identify the VLAN membership of a frame across bridges. The VLAN ID associates a frame with a specific VLAN and provides the information that switches the need to process the frame across the network.
In the following example, VLAN IDs (VIDs) 100 and 200 are added to identify Video-on-Demand and IPTV traffic respectively coming from the VoD and IPTV multicast servers. The Zyxel Device can also tag outgoing requests to the servers with these VLAN IDs.
VLAN Group Example
What You Can Do in this Chapter
Use these screens to manage VLAN groups on the Zyxel Device.
VLAN Group Settings
This screen shows the VLAN groups created on the Zyxel Device. Click Network Setting > VLAN Group to open the following screen.
Network Setting > VLAN Group
The following table describes the fields in this screen.
Network Setting > VLAN Group 
Label
Description
Add New VLAN Group
Click this button to create a new VLAN group.
#
This is the index number of the VLAN group.
Group Name
This shows the descriptive name of the VLAN group.
VLAN ID
This shows the unique ID number that identifies the VLAN group.
Interface
This shows the LAN ports included in the VLAN group and if traffic leaving the port will be tagged with the VLAN ID.
Modify
Click the Edit icon to change an existing VLAN group setting or click the Delete icon to remove the VLAN group.
Add or Edit a VLAN Group
Click the Add New VLAN Group button in the VLAN Group screen to open the following screen. Use this screen to create a new VLAN group.
Network Setting > VLAN Group > Add New VLAN Group/Edit
The following table describes the fields in this screen.
Network Setting > VLAN Group > Add New VLAN Group/Edit 
Label
Description
VLAN ID
Enter a unique ID number, from 1 to 4,094, to identify this VLAN group. Outgoing traffic is tagged with this ID if TX Tagging is selected below.
LAN
Select Include to add the associated LAN interface to this VLAN group.
*Select TX Tagging to tag outgoing traffic from the associated LAN port with the VLAN ID number entered above.
 
Select Include to add the associated LAN interface to this VLAN group.
*Select TX Tagging to tag outgoing traffic from the associated LAN port with the VLAN ID number entered above.
Cancel
Click Cancel to exit this screen without saving any changes.
OK
Click OK to save your changes.