See the following table for help in interpreting environmental reporting features.
Corrective Action
Possible Cause
Symptom
Take corrective steps. See the
environmental specifications table
in
Product Specifications, on page
82
.
For over temperature alert settings,
see
Temperature Sensor , on page 11
.
The air flow to the heat sink fins is
blocked.
The router operates at an
abnormally high temperature. The
following message appears on the
console screen:
%SYS-1-OVERTEMP: System
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 the following table for information to help you
isolate the problem.
Corrective Action
Possible Cause
Symptom
Check the router chassis or
software. For warranty information,
refer to the
Cisco Information
Packet
publication that shipped
with your router or contact
customer service.
The router does not boot properly.
The router constantly or
intermittently reboots.
The router is experiencing network
problems.
Verify that the parameters for your
terminal are set as follows:
•
The terminal should have the
same data rate as the router
(9600 bps is the default).
•
8 data bits.
•
No parity generated or
checked.
•
2 stop bits.
The router boots, but the console
screen is frozen.
There may be a problem with the
module or cable. For warranty
information, refer to the
Cisco
Information Packet
publication that
shipped with your order or contact
customer service.
The router powers on and boots
only when a particular cable is
disconnected.
Cisco ASR 901S Series Aggregation Services Router Hardware Installation Guide
OL-29732-01
77
Troubleshooting
Troubleshooting Cables and Connections