A-2
Cisco 2600 Series Routers Hardware Installation Guide
OL-2171-02
Appendix A Troubleshooting the Router
Reading the LEDs
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 on page 23
. The operating
temperature for the router is 32 to 104
°
F (
0 to 40
°
C
).
•
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
and
Figure A-2
show the locations of the LEDs on the front panel of the Cisco 2600 series
routers.
Table A-2
and
Table A-2
describe these LEDs.
Figure A-1
Cisco 261x, Cisco 262x, Cisco 26xxXM, and Cisco 265x Series Routers—Front-Panel LEDs
POWER
RPS
ACTIVITY
H11660
