Reference Guide

QSFP 168 Voltage Low Alarm threshold = 2.970V
QSFP 168 Bias Low Alarm threshold = 5.000mA
QSFP 168 RX Power Low Alarm threshold = 0.017mW
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QSFP 168 Temp High Warning threshold = 75.000C
QSFP 168 Voltage High Warning threshold = 3.465V
QSFP 168 Bias High Warning threshold = 100.000mA
QSFP 168 RX Power High Warning threshold = 1.698mW
QSFP 168 Temp Low Warning threshold = -5.000C
QSFP 168 Voltage Low Warning threshold = 3.135V
QSFP 168 Bias Low Warning threshold = 10.000mA
QSFP 168 RX Power Low Warning threshold = 0.043mW
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QSFP 168 Temperature = 21.891C
QSFP 168 Voltage = 3.314V
QSFP 168 TX1 Bias Current = 0.000mA
QSFP 168 TX2 Bias Current = 0.000mA
QSFP 168 TX3 Bias Current = 0.000mA
QSFP 168 TX4 Bias Current = 0.000mA
QSFP 168 RX1 Power = 0.000mW
QSFP 168 RX2 Power = 0.000mW
QSFP 168 RX3 Power = 0.000mW
QSFP 168 RX4 Power = 0.000mW
Recognize an Over-Temperature Condition
An overtemperature condition occurs, for one of two reasons: the card genuinely is too hot or a sensor
has malfunctioned.
To discover the cause, inspect cards near the one reporting the condition.
• 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 system messages shown in the following example.
Dell#show alarms threshold
-- Temperature Limits (deg C) --
-------------------------------------------------
Minor Minor Off Major Major Off Shutdown
Linecard 75 70 80 77 85
RPM 65 60 75 70 80
Dell#
Troubleshoot an Over-Temperature Condition
To troubleshoot an over-temperature condition, use the following commands.
1. To monitor the temperature levels, use the show environment commands.
2. Check air flow through the system. Ensure 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
airflow for adequate system cooling.
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Z-Series Debugging and Diagnostics