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Troubleshooting
284
AC1600 WiFi VDSL/ADSL Modem Router Model D6400
Troubleshoot Internet Browsing
If your modem router can obtain an IP address but your computer is unable to load any web
pages from the Internet, it might be for one of the following reasons:
• The traffic meter is enabled, and the limit was reached.
By configuring the traffic meter not to block Internet access when the traffic limit is
reached, you can resume Internet access (see Unblock the Traffic Meter After the Traffic
Limit Is Reached on page 247). If your ISP sets a usage limit, they might charge you for
the overage.
• 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 285.
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 in the web management
interface, do the following:
• When entering configuration settings, always click the Apply button before moving to
another screen 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).