110 | Chapter 7: Troubleshooting
N300 Wireless Gigabit ADSL2+ Modem Router DGN3500 User Manual
Testing the Path from Your Computer to a Remote Device
After verifying 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 in the previous section are displayed. If you do
not re
ceive replies:
• Check th
at your 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
will not be visible in your PC’s Network Control Panel. Verify that the IP address of the
router is listed as the default wireless modem router as described in the online document
that you can access from Preparing Your Network on
page 117.
• Check to
see that the network address of your PC (the portion of the IP address specified
by the netmask) is different from the network address of the remote device.
• Check th
at your cable or DSL modem is connected and functioning.
• If
your ISP assigned a host name to your PC, enter that host name as the account name
in the Basic Settings screen.
• Y
our ISP could be rejecting the Ethernet MAC addresses of all but one of your PCs. Many
broadband ISPs restrict access by allowing traffic only from the MAC address of your
broadband modem, but some ISPs additionally restrict access to the MAC address of a
single PC connected to that modem. If this is the case, you must configure your router to
“clone” or “spoof” the MAC address from the authorized PC. Refer to your N300 Wireless
Gigabit ADSL2+ Modem Router DGN3500 Setup Manual.
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