Troubleshooting
This chapter describes symptoms of problems that could occur with the Cisco 836 or Cisco SOHO 96 routers, identifies the likely underlying problems, and provide steps for solving the problems. The problems are grouped as follows:
•Problems during first startup
•Problems after router is running
For information about problems that could occur with the software, refer to the Cisco 800 Series Routers Software Configuration Guide.
Before You Call Your Cisco Reseller
Some of the solutions in this chapter instruct you to contact your Cisco reseller. Before you contact your reseller, make sure that you have the following information available:
•Router model and serial number (on the back panel)
•Maintenance agreement or warranty information
•Date you received the router
•Brief description of the problem
•Brief description of the steps you have taken to solve the problem
Problems During First Startup
Table 3-1 lists problems that could occur the first time you turn on the router.
Table 3-1 Problems During First Startup
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All LEDs, including OK LED, are off. |
No power to router |
Perform the following tasks: 1. Make sure that all connections to and from the power supply are secure. 2. Make sure that the power outlet has power. 3. Make sure that the power switch is set to ON. 4. If the problem continues, the power supply might be faulty. Contact your Cisco reseller. |
No connection to Ethernet device. (Ethernet 1 LED is off.) |
A cable-related problem: •Improperly connected cable •Damaged cable |
Perform the following tasks: 1. To make sure that you have cabled the device correctly, see the "Connecting a Terminal or PC to the Router's Console Port (Optional)" section on page 2-12. 2. Make sure that the connectors at both ends of the cable are securely seated. 3. Make sure that the cable is not physically damaged. If it is damaged, order another cable from Cisco or replace it with a similar cable. |
No connection to ADSL link. (The CD LED on the front panel is off for a long time.) |
Wrong cable |
•To make sure that you are using the correct cable, see Appendix A, "Specifications and Cables." |
No connection to ADSL link. (The CD LED on the front panel is off for a long time.) |
Improperly connected cable |
•Make sure that you have connected the ADSL cable properly. See the "Connecting an ADSL Line" section on page 2-10. •Make sure that the ADSL port is connected to the correct port on the ISDN splitter. •Make sure that the connectors at both ends of the cable are securely seated. |
Problems After Router Is Running
Table 3-2 lists problems that could occur after the router has been up and running.
Table 3-2 Problems After Router Is Running
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Problems with Ethernet connection. (Ethernet LED 1, 2, 3, or 4 is off or blinking.) |
A cable-related problem: •Disconnected cable •Damaged cable |
•Make sure that the Ethernet port is not configured to be administratively down. •Make sure that the device connected to the Ethernet port is connected, powered on, and properly configured. •Make sure that the connectors at both ends of the cable are secure. •Make sure that the cable is not physically damaged. If it is damaged, order another cable from Cisco Systems or replace it with a similar cable. |
Connection to the ADSL line is intermittent or lost. (The CD LED on the front panel is off.) |
A cable-related problem: •Disconnected cable •Damaged cable |
•Make sure that the Ethernet port is not configured to be administratively down. •Make sure that the device connected to the Ethernet port is connected, powered on, and properly configured. •Make sure that the connectors at both ends of the cable are secure. •Make sure that the cable is not physically damaged. If it is damaged, order another cable from Cisco Systems or replace it with a similar cable. |
Connection to the ADSL line or WAN port is loose. (The CD LED and the Ethernet LED 1, 2, 3, or 4 on the front panel are off). |
Problem with ADSL or WAN service |
•Check all passwords and device names to make sure that they are correct. •Contact your ADSL line or WAN service provider to determine whether there is a problem with the ADSL or WAN service. |