Users Guide

When the system detects a genuine over-temperature condition, it powers o the card. To recognize this condition, look for the
following system messages:
CHMGR-2-MAJOR_TEMP: Major alarm: chassis temperature high (temperature reaches or exceeds
threshold of
[value]C)
CHMGR-2-TEMP_SHUTDOWN_WARN: WARNING! temperature is [value]C; approaching shutdown
threshold of [value]C
To view the programmed alarm thresholds levels, including the shutdown value, use the show alarms threshold command.
NOTE: When the ingress air temperature exceeds 61°C, the Status LED turns Amber and a major alarm is triggered.
Example of the show alarms threshold Command
Dell#show alarms threshold
-- Temperature Limits (deg C) --
-----------------------------------------------------------------------------
Ingress-Air Off Ingress-Air Major Off Major Shutdown
Unit0 58 61 84 86 90
Dell#
Troubleshoot an Over-Temperature Condition
To troubleshoot an over-temperature condition, use the following information.
1. Use the show environment commands to monitor the temperature levels.
2. Check air ow through the system. Ensure that the air ducts are clean and that all fans are working correctly.
3. After the software has determined that the temperature levels are within normal limits, you can re-power the card safely. To
bring back the line card online, use the power-on command in EXEC mode.
In addition, Dell Networking requires that you install blanks in all slots without a line card to control airow for adequate system
cooling.
NOTE: Exercise care when removing a card; if it has exceeded the major or shutdown thresholds, the card could be hot
to the touch.
Example of the show enivornment Command
Dell#show environment
-- Unit Environment Status --
Unit Status Temp Voltage TempStatus
---------------------------------------------------------------------------
* 0 online 59C ok 2
* Management Unit
-- Thermal Sensor Readings (deg C) --
Unit Sensor0 Sensor1 Sensor2
-------------------------------
0 55 45 58
Dell#
Recognize an Under-Voltage Condition
If the system detects an under-voltage condition, it sends an alarm.
To recognize this condition, look for the following system message: %CHMGR-1-CARD_SHUTDOWN: Major alarm: Line
card 2 down - auto-shutdown due to under voltage.
This message indicates that the specied card is not receiving enough power. In response, the system rst shuts down Power over
Ethernet (PoE).
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Debugging and Diagnostics