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ZyXEL Nebula LTE7461-M602 Manual

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Nebula Mobile Router User’s Guide
211
CHAPTER 13
VLAN Group
13.1 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.
Figure 137 VLAN Group Example
13.1.1 What You Can Do in this Chapter
Use these screens to manage VLAN groups on the Zyxel Device.
ZD
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