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Set Up Multiple SSIDs and VLANs on a DD-WRT Router

Article Description

DD-WRT is arguably the most popular firmware replacement or upgrade for select wireless routers. Eric Geier, author of Wi-Fi Hotspots: Setting Up Public Wireless Internet Access , walks you through creating a second SSID, segregating it from the main SSID, making two of the LAN ports on the back of the router connect to just the new SSID, and leaving the other two LAN ports connected to the main SSID.
Separating the LAN ports

Separating the LAN ports

Now you can optionally split the ethernet ports in the back of the router among the main and new network, otherwise all of them will stay assigned to the main network. First, we’ll move LAN ports 3 and 4 to a different VLAN:

  1. Select Setup > VLANs.
  2. Deselect the checkboxes for Port 3 and Port 4 (in the VLAN 0 column) and then check Port 3 and Port 4 in the VLAN 2 column.
  3. Click Apply Settings.

Now you must move VLAN 2 to the new bridge:

  1. Select Setup > Networking.
  2. In the Assign to Bridge section, click the Add button.
  3. Select br1 in the left drop-down menu.
  4. Select vlan2 for the Interface
  5. Click Apply Settings.

Testing It Out

Now that we’ve done most of the configuration, you ought to test it out. Connect to the main SSID and plug into the first two LAN ports; you should get an IP within the 192.168.1.100 – 192.168.1.149 range. Then connect to the new SSID and last two LAN ports; you should get an IP in the new subnet you created (for instance 192.168.2.1 with a range of 192.168.2.100 – 192.168.2.149). Make sure you get an active Internet connection on both networks.

To check your IP address in Windows, open the Network Connections window via the Start Menu, Control Panel, or Network and Sharing Center. Then double-click the desired network connection. On the Network Connection Status window, click Details. You can also see your IP details in a command prompt by typing ipconfig /all.

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