User's Manual

Table Of Contents
of 181.4°F (83°C), the power supply will cycle to prevent the router from exceeding that temperature while
being powered up state.
See the following table for help in interpreting environmental reporting features.
Corrective ActionPossible CauseSymptom
Take corrective steps. For
information about environmental
operating conditions, see Table 8
in
Product Specifications, on page
72.
For over temperature alert settings,
see Environmental Monitoring
Temperature Sensor , on page 10.
The air flow to cooling vents 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 ActionPossible CauseSymptom
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.
Cisco ASR 901S Series Aggregation Services Router Hardware Installation Guide
OL-29732-01 69
Troubleshooting
Troubleshooting Cables and Connections
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