Users Guide

SFP 49 Rx LOS state = False
SFP 49 Tx Fault state = False
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.
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 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
306
Debugging and Diagnostics