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Troubleshooting Cisco 2800 Series Routers
OL-5789-01
Solving Problems
• Does the router shut down after being on a short time?
–
Check for an environmentally induced shutdown. See the next section, “Environmental
Reporting Features.”
–
Check the environmental site requirements in the “General Site Requirements” section on
page 3.
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Ensure that all interface cards and internal modules are correctly installed.
–
Check for a power supply failure by inspecting the SYS PWR LED on the front panel. If it is
green, the power supply is functional.
• Router partially boots, but LEDs do not come on.
–
Check for a power supply failure by inspecting the SYS PWR LED on the front panel of the
router. If the SYS PWR LED is blinking or continuous green or continuous amber, the power
supply is functional.
–
If the SYS PWR LED is not on, refer to the “Cisco 90-Day Limited Hardware Warranty Terms”
section of the “Cisco 2800 Series Hardware Documents: Introduction and Warnings” document
for warranty information, or contact customer service.
–
Check for a power supply failure by inspecting the power supply LEDs on the front panel. See
the “Reading System LEDs” section on page 4 for power supply LED descriptions.
Environmental Reporting Features
If the router is operating at an abnormally high temperature, the following message is displayed on the
console screen:
%SYS-1-OVERTEMP: System detected OVERTEMPERATURE condition. Please resolve cooling problem
immediately!
Some causes of abnormally high router temperature are as follows:
• 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 4, and the
“Equipment Racks” section on page 5.
Troubleshooting Modules, Cables, and Connections
Network problems can be caused by a module; cables or cable connections; or external devices such as
a modem, transceiver, hub, wall jack, WAN interface, or terminal. Check for the following symptoms to
help isolate the problem:
• Module is not recognized by the router.
–
Make sure that the module is firmly seated in its slot.
–
Check the LEDs on the module. Each module has its own set of LEDs. For information on these
LEDs, refer to the online Cisco Network Modules Hardware Installation Guide.