Temperature Management
Chassis and Power Supplies
page 2-30
OmniSwitch 7700/7800 Hardware Users Guide
April 2005
Temperature Errors
The CMM monitors the chassis ambient air temperature at all times via an onboard sensor. If an over-
temperature condition occurs, there are two different levels of error severity:
•
Warning threshold has been exceeded
•
Danger threshold has been exceeded
Warning Threshold
If the temperature exceeds the switch’s user-configurable
warning threshold
, the CMM sends out a trap.
Traps are printed to the console in the form of text error messages. The CMM’s TEMP LED also displays
amber, indicating an error. (Refer to
Chapter 2, “Chassis and Power Supplies”
for CMM front panel
descriptions, including status LEDs.)
When the warning threshold has been exceeded, switch operations remain active. However, it is recom-
mended that immediate steps be taken to address the over-temperature condition.
Addressing warning threshold temperature conditions may include:
•
Checking for a chassis air flow obstruction
•
Checking the ambient room temperature
•
Checking the fan tray status using the
command. See page
•
Verifying that the warning threshold has not been manually set to an otherwise common or acceptable
ambient temperature—for example, 31 degrees Centigrade. (The default warning threshold is 60C. This
value may be configured using the
command. The current set warning threshold may
be viewed using the
Note.
Once the ambient air temperature is reduced to below the warning threshold, the CMM’s TEMP
LED automatically resets to green.
Danger Threshold
If the chassis ambient air temperature rises above the switch’s danger threshold of 80 degrees Centigrade,
the switch will power off all Network Interface (NI) modules until the temperature conditions have been
addressed and the switch is manually booted. The danger threshold is factory-set and cannot be config-
ured by the user.
Addressing danger threshold temperature conditions may include:
•
Checking for a chassis air flow obstruction
•
Checking the ambient room temperature
•
Checking the fan tray status using the
command. See page
Note.
When the danger threshold has been exceeded, the CMM’s TEMP LED will not reset from amber to
green until after a system boot.
