Temperature Management
Chassis and Power Supplies
page 2-26
OmniSwitch 8800 Hardware Users Guide
December 2004
Grounding the Chassis
The switch has two threaded holes for grounding screws located on the back of the chassis, just above the
rear (fabric) fan tray. These holes use 10-32 screws and are approximately one inch apart. These holes are
surrounded by a small paint-free rectangular area, which provides metal-to-metal contact for a ground
connection.
Use this connector to supplement the ground provided by the AC power cord. To do so, install a Panduit
Grounding Lug (type LCD8-10A-L) using 8AWG copper conductors to the paint-free rectangular area. Be
sure to use a crimping tool.
Temperature Management
The operating temperature of your switch is an important factor in its overall operability. In order to avoid
a temperature-related system failure, your switch must always run at an ambient temperature between
0 and 45 degrees Celsius (32 to 113 degrees Fahrenheit).
To avoid chassis over-temperature conditions, follow these important guidelines:
1
Be sure that your switch is installed in a well-ventilated environment. To ensure adequate airflow,
allow at least six inches of clearance at the front and back of the chassis. In addition, leave at least two
inches of clearance at the left and right sides.
2
If your switch chassis is not fully populated with NI modules, be sure that blank cover panels are
installed at empty slot positions at all times. Blank cover panels help regulate airflow and thus regulate the
overall operating temperature in the switch. Refer to
for more information.
Monitoring Chassis Temperature Status.
To check the switch’s current temperature status, use the
command. For example:
-> show temperature
Hardware Fabric Temperature (deg C)
= 34,
Hardware Cpu Temperature (deg C)
= 28,
Temperature Fabric Upper Threshold Range (deg C)= 60 to 75,
Temperature Cpu Upper Threshold Range (deg C)
= 50 to 62,
Temperature Fabric Upper Threshold (deg C)
= 60,
Temperature Cpu Upper Threshold (deg C)
= 50,
Temperature Range
= UNDER THRESHOLD,
Temperature Fabric Danger Threshold (deg C)
= 75,
Temperature CPU Danger Threshold (deg C)
= 62
For more information about these displays, see the “Chassis Management and Monitoring Commands”
chapter in the
OmniSwitch CLI Reference Guide
.
