Dsl setup troubleshooting

If the DSL Sync light is solid, try the following:. Reboot the computer It seems trivial, but you should always begin troubleshooting computer problems by rebooting your computer. This is particularly important if your computer has worked fine in the past and has only just begun to exhibit problems. The LAN link light will blink when your computer is sending or receiving data.

If the link light is not lit, try the following:. Power-cycle the DSL modem Turning the modem off and back on causes it to re-synchronize the DSL signal and the network connection to your computer. If the DSL Sync light is solid, try the following: Reboot the computer It seems trivial, but you should always begin troubleshooting computer problems by rebooting your computer. If the link light is not lit, try the following: Make sure the Ethernet cable connecting your DSL modem with your computer is plugged securely into the back of the DSL modem.

By running your computer directly into the DSL modem, you can eliminate the possibility that the router or other device on your network is causing the problem. On some modems, this light is on the power supply itself. If the power light is off or flashing, check that the power supply is plugged securely into the modem, and plugged into a working wall outlet.

The LAN link light will blink when your computer is sending or receiving data. If the link light is not lit, try the following: 1. We suggest you remove and re-plug the cable into the DSL modem and your computer to ensure the cable is plugged in securely. If you have not done so already, try bypassing the router and running a cable from your computer directly into the DSL modem.

This will help you eliminate the possibility that one of these devices may be causing your problem. The cable that connects your DSL modem with your computer may be bad. Try a different cable if possible. If you have read through this guide and are still unable to connect to the Internet or have other questions, call us for help.

If this is not the case, check the configuration on the router. If packets are incrementing in both directions, continue with the troubleshooting steps in this document. In order to accomplish this, you need to run a series of debug commands on the Cisco DSL Router and interpret the output.

The primary debug you use is debug ppp negotiation. This command output is an example of a successful PPP negotiation:. Your ISP not responding should not be a problem since you already verified that packets are incrementing on the ATM0 interface in the inbound direction. However, if you see packets incrementing on ATM0 in the inbound direction, and when you run a debug ppp negotiation you receive this, contact your ISP in order to verify that packets are sent to the Cisco DSL Router.

In this output there are only O packets, which are outbound packets. This output shows an example of a PPP option mismatch:. What this means is that one side of the PPP connection asks for a PPP option that the other side is unable or not configured to perform. Issue the command show run interface dialer 1 in order to view your interface dialer 1 configuration.

In the case of the router sending packets, you might need to call the Cisco Support in order to determine which command s need to be enabled on the Cisco DSL Router.

There are two scenarios in which this can occur. The first scenario is an authentication type mismatch, which is caused when you do not properly configure the router. If you do not have both configured, you might see output from a debug ppp command like this example:.