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245U-E Wireless Ethernet Modem User Manual
Rev Version 2.24
Enabling VLANs will allow the module to facilitate a number of possible VLAN topologies, such as:
• Segregating a wireless network into multiple virtual networks.
• Functioning as the wireless backbone on a VLAN trunk.
• Enabling a wireless network or part of the wireless network to form a VLAN trunk.
• Defining multiple virtual networks, each with a different priority to define traffic class based forwarding
behavior over the radio channel.
Each module can be set up to accept different networks by configuring VLAN groups and having the
interfaces (such as Ethernet, Wireless, or WDS repeater) configured to accept or reject tagged or untagged
communications frames.
Operation
VLAN Pass-through is enabled by default in the modem. No VLAN configuration is needed and modem
will pass any VLAN tagged frames. To initiate VLAN bridge or router operation, VLAN Aware mode must be
enabled on the VLAN page.
Figure 67
VLAN Pass-through
When VLAN Aware is enabled a default “Management VLAN Group” is created bridging the Ethernet and
wireless interfaces and configuring both with untagged frames. The “Management IP” and “Management
Netmask” addresses will override the modules “IP Address” and “Subnet Mask” and the Device Mode
will be changed to “VLAN Bridge.” These changes will be indicated on the Network page of the module. A
Management VLAN is created to ensure that the module will be accessible for configuration and diagnostics
after setup.
If more than one interface is added to a VLAN group, a separate bridge will be created for the VLAN group.
The configured interfaces for the VLAN group will then be configured as ports on the bridge.
In Figure 68, the Management VLAN has two interfaces configured, Ethernet and Wireless, and both are
set to “Untagged.” This means the module can be accessed by either Ethernet or Wireless networks using
untagged frames.
