Cisco CISCO1841 - 1841 Integrated Services Router User Manual

6-3
Cisco 1800 Series Integrated Services Routers (Fixed) Hardware Installation Guide
OL-6425-03
Chapter 6 Troubleshooting
Solving Problems
• 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
– Blocked cooling vents
Take steps to correct the problem. Also see the “Site Environment” section on page 2-4.
• If the fan is not rotating at the desired speed, the following message is displayed on the console
screen:
%ENVMON-3-FAN_FAILED: Fan not rotating.
Make sure that the fan power cable is properly attached to the mainboard fan power connector. If the
problem persists, contact your technical support representative.
Troubleshooting Cables and Connections
Network problems can be caused by cables or cable connections, or by external devices such as a
modem, transceiver, hub, wall jack, WAN interface, or terminal. Check for the following symptoms to
help isolate the problem:
• The interface ports do not initialize.
– Check external cable connections.
• The router does not boot properly, or it constantly or intermittently reboots.
– Check the router chassis or software. See the “Cisco One-Year Limited Hardware Warranty
Terms” and the “Obtaining Documentation and Submitting a Service Request” sections of the
Preface for warranty and customer service contact information.
• The router boots, but the console screen is frozen, it displays no output, or it 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
• The router powers on and boots only when a particular cable is disconnected.
– There may be a problem with the module or cable. See the “Cisco One-Year Limited Hardware
Warranty Terms” and the “Obtaining Documentation and Submitting a Service Request”
sections of the Preface for warranty and customer service contact information.

Cisco CISCO1841 - 1841 Integrated Services Router Specifications

General

Brand	Cisco
Model	CISCO1841 - 1841 Integrated Services Router
Category	Network Router
Language	English