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AC1600 WiFi VDSL/ADSL Modem Router Model D6400
• Your computer might not recognize any DNS server addresses.
A DNS server is a host on the Internet that translates Internet names (such as www
addresses) to numeric IP addresses. Typically your ISP provides the addresses of one or
two DNS servers for your use. If you entered a DNS address when you set up the modem
router, reboot your computer and verify the DNS address. Alternatively, you can configure
your computer manually with DNS addresses, as explained in your operating system
documentation
.
• The modem router might not be configured as the
TCP/IP router on your computer.
For information about
TCP/IP problems, see Troubleshoot Your Network Using the Ping
Utility on page 281.
If your computer obtains its information from the modem router by DHCP, reboot the
computer and verify the modem router address.
Changes Are Not Saved
If the modem router does not save the changes that you make on the modem router’s web
pages, do the following:
• When entering configuration settings, always click the Apply button before moving to
another page or tab or your changes are lost.
• Click the Refresh or Reload button in the web browser. It is possible that the changes
occurred but that the old settings remain in the web browser’
s cache.
Troubleshoot the WiFi Connectivity
If you are experiencing trouble connecting over WiFi to the modem router, try to isolate the
problem:
• Make sure that the WiFi settings in your WiFi device and modem router match exactly.
For a device that is connected over WiFi, the WiFi network name (SSID) and WiFi
security settings of the modem router and WiFi computer must match exactly. The default
SSID and password are on the product label (see
Bottom Panel Product Label on
page 15).
• Does the WiFi device that you are using find your WiFi network?
If not, check the WiFi LED
on the front of the modem router. If this LED is off, both
WiFi radios might be disabled. For more information about the WiFi radios, see Control
the WiFi Radios on page 110.
• If you disabled the modem router’s SSID broadcast, your WiFi network is hidden and
does not display in your WiFi client’s scanning list. (By default, SSID broadcast is
enabled.) For more information, see Manage the Basic W
iFi Settings and WiFi Security of
the Main Network on page 93.