User's Manual

Troubleshooting
152
N600 Wireless Dual Band Gigabit ADSL2+ Modem Router DGND3700
Test the Path from Your Computer to a Remote Device
After you verify that the LAN path works correctly, test the path from your PC to a remote
device. In the Windows Run screen, type:
ping -n 10 IP address
where IP a
ddress is the
IP address of a remote device such as your ISP’s DNS server.
If the path is functioning correctly, replies as described in Test the LAN Path to Your Wireless
Modem Router on pag
e 151 display. If you do not receive replies:
• Check that yo
ur PC has the IP address of your router listed as the default wireless
modem router. If the IP configuration of your PC is assigned by DHCP, this information is
not visible in your PC’s Network Control Panel. Verify that the IP address of the router is
listed as the default wireless modem router.
• Check that the network add
ress of your PC (the portion of the IP address specified by the
netmask) is different from the network address of the remote device.
• Check that yo
ur cable or ADSL modem is connected and functioning.
• If your ISP assigned a host name to your PC, enter that host name as the account name
in t
he Basic Settings screen.
• Your ISP could be rejecting the Ethernet MAC addresses of all but one of your PCs. Many
broad
band ISPs restrict access by allowing traffic only from the MAC address of your
modem, but some additionally restrict access to the MAC address of a single PC
connected to that modem. In this case, configure your router to clone or spoof the MAC
address from the authorized PC.
Cannot Log In
If you cannot log in to the wireless modem router from a computer on your local network,
check the following:
• Th
e router is plugged in and it is on.
• You are using the correct login information. The login name is ad
min, and the password
is password. Make sure that Caps Lock is off when you enter this information.
• If you cannot connect wirelessly, try an Ethernet
connection and view the router wireless
settings and set up your wireless computer with corresponding wireless settings.
• If you are using an Ethernet-connected computer, check the Ethernet connection
between
the computer and the router. The LAN LED for the port you are using on the
router should light up to show your connection.
• Your computer’s IP address is on the same subnet as the router. If you are using the
reco
mmended addressing scheme, your computer’s address should be in the range
192.168.0.2 to 192.168.0.254.
• If the computer IP address is 169.254.x.x, recent versions of Windows
and Mac OS
generate and assign an IP address when the computer cannot reach a DHCP server. The