Owner's Manual

Troubleshooting

N300 Wireless Gigabit ADSL2+ Modem Router DGN3500

LAN or ADSL Port LED Is Not On

If either the LAN LEDs or ADSL Link LED does not light when the Ethernet connection is

made, check the following:

• Make sure that the Ethernet cable connections are secure at the router and at the hub or

workstation.

• Make sure that power is turned on to the connected hub or workstation.

• Be sure you are using the correct cable: when connecting the ADSL port, use the cable

that was supplied with the wireless modem router. If the ADSL link LED is still off, this

may mean that there is no ADSL service or the cable connected to the ADSL port is bad.

Window Appears Asking You to Reload Firmware

If a window appears with a message asking you to reload the firmware, this indicates that a

problem has been detected with the current firmware. Please follow the on-screen

instructions to access new firmware and reload the firmware into your router.

Cannot Log in to the N300 Wireless Modem Router

If you are unable to log in to the wireless modem router from a computer on your local

network, check the following:

• If you are using an Ethernet-connected computer, check the Ethernet connection

between the computer and the router as described in the previous section.

• Make sure that your computer’s IP address is on the same subnet as the router. If you are

using the recommended addressing scheme, your computer’s address should be in the

range of 192.168.0.2 to 192.168.0.254. Follow the instructions in the online document

that you can access from

Preparing Your Network on page 103 for information about how

to configure your computer.

• If your computer’s IP address is shown as 169.254.x.x, recent versions of Windows and

MacOS will generate and assign an IP address if the computer cannot reach a DHCP

server. These auto-generated addresses are in the range of 169.254.x.x. If your IP

address is in this range, check the connection from the computer to the router, and reboot

your computer.

• If your router’s IP address was changed and you do not know the current IP address,

clear the router’s configuration to factory defaults. This sets the router’s IP address to

192.168.0.1. This procedure is explained in

Using the Wireless On/Off and WPS Buttons

to Reset the Router on page 98.

• Make sure that your browser has Java, JavaScript, or ActiveX enabled. If you are using

Internet Explorer, click Refresh to be sure that the Java applet is loaded.

• Try quitting the browser and launching it again.