4
Troubleshooting Cisco 2800 Series Routers
OL-5789-01
Reading System LEDs
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Make sure that you have a version of Cisco IOS software that supports the module. Check the
Cisco 2800 Series Cards and Modules online document for software requirements for the
network module.
•Module is recognized, but interface ports do not initialize.
–
Make sure that the module is firmly seated in its slot.
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Check external cable connections.
–
Make sure that you have a version of Cisco IOS software that supports the module. Check the
software requirements for the affected module, which can be found in the configuration note
that shipped with the network module.
•Router does not boot properly, or constantly or intermittently reboots.
–
Make sure that the module is firmly seated in its slot.
–
Check the router chassis or software. Refer to the “Cisco 90-Day Limited Hardware Warranty
Terms ” and the “Obtaining Technical Assistance” section s of the “Cisco 2800 Series Hardware
Documents: Introduction and Warnings” online document for warranty and customer service
contact information.
•Router boots, but the console screen is frozen, displays no output, or displays garbled output.
–
Check the external console connection.
–
Verify that the parameters for your terminal are set as follows:
(a) The same data rate as configured for the router (9600 baud is the default)
(b) 8 data bits
(c) 1 stop bit
(d) No parity generated or checked
•Router powers on and boots only when a particular module is removed.
–
Check the module. Refer to the “Cisco 90-Day Limited Hardware Warranty Terms” and the
“Obtaining Technical Assistance” sections of the “Cisco 2800 Series Hardware Documents:
Introduction and Warnings” online document for warranty and customer service contact
information.
–
Confirm that the Cisco IOS release installed in the router supports the card. The CiscoInterface
Cards Installation Guide lists the software requirements for each card.
•Router powers on and boots only when a particular cable is disconnected.
–
There may be a problem with the module or cable. Refer to the “Cisco 90-Day Limited
Hardware Warranty Terms” and the “Obtaining Technical Assistance” sections of the “Cisco
2800 Series Hardware Documents: Introduction and Warnings” online document. document for
warranty and customer service contact information.
Reading System LEDs
The system LEDs on the front panel of the router provide information about the power, data packet
activity, and flash memory activity. For an explanation of these LEDs see Table 1 .