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B.4 Problems when accessing the Internet or remote network
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Cant’s access the Internet or remote network
There are four possibilities to causes this problem
1. The connection between the computer and the Modem
2. The connection between the Modem and your NSP
3. The connection between your NSP and your ISP
4. The connection between your ISP and the Internet
To isolate the problem, you can verify IP connectivity with following steps by running a
ping
<IP address>
command. For example,
ping 192.168.254.254
.
1. Ping the IP address of your PC. If you get a response back, proceed to next step
directly. If you don’t get a response back, check that:
- The network adapter card is installed.
- The TCP/IP protocol is installed.
- The TCP/IP protocol is bound to the network adapter.
2. Ping the IP address of your Modem. If you get a response back, proceed to next step
directly. If you don’t get a response back, the problem lies between your PC and your
Modem:
- Check the cables.
- Check the hub.
- Make sure that your PC and your Modem belong to the same IP sub network.
- Observe the TX and RX LEDs to see if data traffic flow appears to be normal
3.
Ping
the
DNS
server.
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If the Modem is configured to bridging mode
- Be sure to reboot the Modem if you have made any changes with configuration.
- All IP addresses must be in the same IP sub network.
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If the Modem is configured to routing mode
- Check that IP Routing is enabled at the local and the remote end.
- Make sure he IP addresses of the local and remote networks belong to different IP
sub networks.
- Make sure that there is an existing route to the remote network.
- Make sure that there is a route back from the remote network.
- Be sure to reboot the Modem if you have made any changes with configuration.
B.5 Contact us for Technical support
We are committed to providing our customers with reliable products and documentation, backed
by excellent technical support.
Before contacting us, please l
ook in this chapter for a solution to your problem. You may find a
solution in this chapter. If you cannot find a solution, collect your configuration information listed
below before contacting our technical support. We can help you with your problem more
effectively if you have completed the configuration information.
Model number:
Serial (MAC) number:
Firmware version:
PC configuration
Network configuration
Other:
