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GS-R250S Installation Guide
Experience the Internet @ GreatSpeed
-Make sure the PC and the modem are on the same IP subnetwork or the target router is
reachable through a router on your LAN.
-Make sure the TCP/IP properties are set correctly in your PC.
-Make sure the DATA LED on the modem’s front panel blinks when pinged.
Problems when accessing the Internet or remote network
• Cannot access the Internet or remote network
-There are four possible causes to 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 the 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 the next
step directly. If you do not get a response back, be sure that:
- Your network interface card (NIC) is properly installed
- TCP/IP protocol is installed
- TCP/IP protocol is bound to the NIC
2. Ping the IP address of your modem. If you 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
- Watch the DATA LED to see if data traffic flow changes with
configuration
3. Ping the DNS server
• If the modem is configured to bridging mode
- Be sure to reboot the modem if you have made any changes to the configuration
- All IP address must be in the same IP sub network
• If the modem is configured to routing mode
- Check that IP Routing is enabled at the local and the remote end
- Make sure the 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 an existing route back from the remote network
- Be sure to reboot the modem if you have made any changes to the configuration
