Users Guide

QSFP 52 Temp Low Warning threshold = 0.000C
QSFP 52 Voltage Low Warning threshold = 3.135V
QSFP 52 Bias Low Warning threshold = 1.000mA
QSFP 52 RX Power Low Warning threshold = 0.112mW
===================================
QSFP 52 Temperature = 30.602C
QSFP 52 Voltage = 3.311V
QSFP 52 TX1 Bias Current = 0.000mA
QSFP 52 TX2 Bias Current = 0.000mA
QSFP 52 TX3 Bias Current = 0.000mA
QSFP 52 TX4 Bias Current = 0.000mA
QSFP 52 RX1 Power = 0.000mW
QSFP 52 RX2 Power = 0.000mW
QSFP 52 RX3 Power = 0.000mW
QSFP 52 RX4 Power = 0.000mW
Recognize an Overtemperature Condition
An overtemperature condition occurs, for one of two reasons: the card genuinely is too hot or a sensor has malfunctioned.
Inspect cards adjacent to the one reporting the condition to discover the cause.
• If directly adjacent cards are not normal temperature, suspect a genuine overheating condition.
• If directly adjacent cards are normal temperature, suspect a faulty sensor.
When the system detects a genuine over-temperature condition, it powers off 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.
Example of the show alarms threshold Command
Dell#show alarms threshold
-- Temperature Limits (deg C) --
----------------------------------------------------------------
Minor Off Minor Major Off Major Shutdown
Unit2 55 60 75 80 85
----------------------------------------------------------------
Minor Off Minor Major Off Major Shutdown
Unit3 55 60 75 80 85
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 flow 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, to control airflow for adequate system cooling, Dell Networking requires that you install blanks in all slots without a line card.
NOTE:
Exercise care when removing a card; if it has exceeded the major or shutdown thresholds, the card could be hot
to the touch.
Debugging and Diagnostics 925