Power Supplies - Cisco MDS 9396V Hardware Installation Manual

Power Supplies

switch or fail, the switch will shut down after 80 seconds to prevent potential undetectable overheating. To
display temperature threshold values, use the show environment temperature command.
The direction of the airflow of all fan modules installed in a switch must be the same. If all fan modules do
not have the same airflow direction, then the switch is powered down after 20 seconds. Airflow direction
through a fan module is denoted by a color on the module faceplate:
• Red – indicates port-side intake airflow (DS-C96V-FAN-I)
• Blue – indicates port-side exhaust airflow (DS-C96V-FAN-E)
To display the current status of the fan modules in the switch through the CLI, use the show inventory fan
command.
Figure 5: Cisco MDS 9396T Fan Modules
The following table describes the status LED located on each fan module.
LED
Green
Red
The airflow direction of the PSUs must match the direction of the fan modules. If the airflow of a newly
inserted power supply unit is different from that of the fan modules, the newly inserted incompatible PSU
will be disabled to avoid affecting system thermal performance.
For information about replacing and installing fan modules, see
page
Power Supplies
The Cisco MDS 9396V Multilayer Fabric switch supports two hot-swappable power supply units (PSUs).
Each unit has a power receptacle, a status LED on the faceplate, and a handle for inserting and removing the
unit from the chassis. The Cisco MDS 9396V switch requires a minimum of 1 PSU for normal operation and
2 PSUs for normal operation with PSU redundancy. In the event of a PSU or AC supply (in grid redundant
Cisco MDS 9396V Multilayer Fabric Switch Hardware Installation Guide
10
31.
Status
Fan is operating normally
One or more fans in the module is faulty
Installing and Removing Components, on
Overview