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Troubleshooting Cisco 1800 Series Routers (Modular)
OL-5883-01
Reading LEDs
• Router boots, but the console screen is frozen.
–
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 card is removed.
–
Check the card. Refer to the “Cisco One-Year Limited Hardware Warranty Terms” section on
page 8 and the “Obtaining Technical Assistance” section on page 10 of the “Introduction to
Cisco 1800 Series Routers (Modular) Hardware Documentation” document for warranty and
customer service contact information.
• Router powers on and boots only when a particular cable is disconnected.
–
There may be a problem with the card or cable. Refer to the “Cisco One-Year Limited Hardware
Warranty Terms” and the “Obtaining Technical Assistance” sections of the “Introduction to
Cisco 1800 Series Routers (Modular) Hardware Documentation” document for warranty and
customer service contact information.
Reading LEDs
The LEDs on the router enable you to determine router performance and operation. The System Power
(SYS PWR) LED and the System Activity (SYS ACT) LED are on the front panel; all the other LEDs
are on the back panel.