Cisco Systems ASR 901 10G Troubleshooting Cables and Connections, Information Packet publication

Appendix A Troubleshooting

Problem Solving

Table A-2	Interpreting Environmental Reporting Features
Symptom		Possible Cause	Corrective Action
The router operates at an		There is a fan failure.	Take corrective steps. For
abnormally high temperature.		There is an air conditioner	information about environmental
The following message appears			operating conditions, see the
		failure in the room.
on the console screen:			System Specifications, page 1-9).
		The air flow to cooling vents is
%SYS-1-OVERTEMP: System
		blocked.
detected OVERTEMPERATURE
condition. Please resolve
cooling problem immediately!

Troubleshooting Cables and Connections

Network problems can be caused by a cable or cable connection, or external device such as a modem, transceiver, hub, wall jack, WAN interface, or terminal. See Table A-3for information to help you isolate the problem.

Table A-3	Troubleshooting Cables, and Connections
Symptom		Possible Cause	Corrective Action
The router is experiencing		The router does not boot	Check the router chassis or
network problems.		properly.	software. For warranty
		The router constantly or	information, refer to the Cisco
			Information Packet publication
		intermittently reboots.
			that shipped with your router or
			contact customer service.
		The router boots, but the console	Verify that the parameters for
		screen is frozen.	your terminal are set as follows:
			(a) The terminal should have
			the same data rate as the
			router (9600 bps is the
			default).
			(b) 8 data bits.
			(c) No parity generated or
			checked.
			(d) 2 stop bits.
		The router powers on and boots	There may be a problem with the
		only when a particular cable is	module or cable. For warranty
		disconnected.	information, refer to the Cisco
			Information Packet publication
			that shipped with your order or
			contact customer service.

Cisco ASR 901 10G Series Aggregation Services Router Hardware Installation Guide

OL-28105-02 A-3