Cisco Systems 2600 manual Troubleshooting the Power and Cooling Systems

Appendix A Troubleshooting

Isolating Problems

•Modules—LEDs on the modules can help identify a failure.

•Cables—External cables that connect the router to the network.

Troubleshooting the Power and Cooling Systems

Both the system LED and the fans can help you troubleshoot a power problem. Check the following items to help isolate the problem:

•With the power switch on, does the system LED stay on or blink?

–If the LED is green, the router is receiving power and is functional.

–If the LED is off, check the power source and power cable.

•With the power switch on and the system LED on, do the fans operate?

–If no, check the fans.

•With the power switch on and the system LED off, do the fans operate?

–If yes, the router is receiving power. The fans are connected directly to the DC outputs of the power supply.

–If no, check the power source and power cable.

•Does the router shut down after being on a short time?

–Check for an environmentally induced shutdown. See the “Environmental Reporting Features” section on page A-2.

–Check the environmental site requirements in the “General Site Requirements” section on page 2-3.

–Check for a power supply failure by inspecting the system LED on the front panel. If the system LED is on or blinking, the power supply should be functional.

•Router partially boots, but LEDs do not come on.

–Check for a power supply failure by inspecting the system LED on the front panel of the router. If the system LED is on, the power supply is functional.

–If the system LED is not on, refer to the warranty information in the quick start guide that shipped with your router, or contact customer service. The quick start guide is also available on the Cisco Documentation CD-ROM and online.

Environmental Reporting Features

If the router is operating at an abnormally high temperature, you see the following message on the console screen:

%SYS-1-OVERTEMP: System detected OVERTEMPERATURE condition. Please resolve cooling problem immediately!

Some causes of abnormally high router temperature are:

•Fan failure

•Air conditioner failure in the room

•Air blockage to cooling vents

Take steps to correct the problem. See also the “Site Environment” section on page 2-3, and the “Equipment Racks” section on page 2-4.

Cisco 2600 Series Routers Hardware Installation Guide