Table of Contents

Isolating Problems

Troubleshooting the Power and Cooling Systems
Troubleshooting the Ports, Cables, and Connections

Reading the LEDs

Troubleshooting the Router

This appendix contains information about isolating problems with the router and includes the following sections:

• Isolating Problems

• Reading the LEDs

For information about obtaining technical support, see the "Obtaining Technical Assistance" section.

Isolating Problems

The key to problem solving in this system is to try to isolate the problem to a specific subsystem. By comparing what the system is doing to what it should be doing, the task of isolating and solving the problem is greatly simplified.

When problem solving, consider the following subsystems:

• Power and cooling systems---Power supply, power cable, and fan

• Ports, cables, and connections---Ports on the rear panel of the router and the cables that connect to them

Troubleshooting the Power and Cooling Systems

Check the following items to help isolate the problem:

• When the power switch is in the ON position (|) and the power LED is on, make sure the fan is operating. If not, check the fan.

• If the router shuts down after being on a short time, check the environmental conditions. The router might be overheating, resulting in a thermal-induced shutdown. Verify that the chassis intake and exhaust vents are clear. Review the "General Site Requirements" section. The operating temperature for the router is 32 to 104ºF (0 to 40ºC).

• If the router fails to boot, but the power LED is on, check the power supply.

• If the router constantly or intermittently reboots, there might be a problem with either the processor or the software, or a DRAM single in-line memory module (SIMM) might be installed incorrectly.

Troubleshooting the Ports, Cables, and Connections

Check the following items to help isolate the problem:

• If the router fails to recognize a port, check the cable connection.

• When the power switch is in the ON position (|), make sure the power LED is on. If not, check the power source and power cable.

• If the system boots, but the console screen is frozen, verify that the console is configured for 9600 baud, 8 data bits, no parity, and 2 stop bits.

Reading the LEDs

The LEDs indicate the current operating condition of the router. By observing the LEDs, you can note any fault condition that the router is encountering, and then contact your system administrator or customer service, when necessary.

Figure A-1 shows the location of the LEDs on the front panel of the Cisco 2600 series routers. Table A-1 describes these LEDs.

Figure A-2 shows the location of the Cisco 2610 rear-panel LEDs and Figure A-3 shows the location of the Cisco 2611 rear-panel LEDs. Table A-2 describes these LEDs.

Figure A-4 shows the location of the Cisco 2612 rear-panel LEDs and Figure A-5 shows the location of the Cisco 2613 rear-panel LEDs. Table A-3 describes these LEDs.

Figure A-6 shows the location of the Cisco 2620 rear-panel LEDs and Figure A-7 shows the location of the Cisco 2621 rear-panel LEDs. Table A-4 describes these LEDs.

Figure A-8 shows the location of the Cisco 2650 rear-panel LEDs and Figure A-9 shows the location of the Cisco 2651 rear-panel LEDs. Table A-5 describes these LEDs.

Posted: Mon Jul 31 09:35:37 PDT 2000
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