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Overview of Fan Trays
Note
To display the current power supply configuration, use the show environment power command.
Before you begin
For grid redundancy mode, the power supplies must be divided into two equal sets and installed as follows:
• Slots PS 1 to PS 5 must be connected to one grid (Grid A).
• Slots PS 6 to PS 10 must be connected to another grid (Grid B).
Step 1
Use the configure terminal command to enter the global configuration mode.
Example:
switch# configure terminal
switch(config)#
Step 2
Use the power redundancy-mode mode command to specify one of the following power modes:
• For combined mode, include the combined keyword.
• For n+1 redundancy mode, include the ps-redundant keyword.
• For n+n redundancy mode, include the insrc_redundant keyword.
Example:
switch(config)# power redundancy-mode insrc_redundant
switch(config)#
Overview of Fan Trays
Fan trays provide airflow through the switch for cooling. Each fan tray contains multiple fans to provide
redundancy. The switch can continue functioning in the following situations:
• One or more fans fail within a fan tray—Even with multiple fan failures, the switch can continue
• The fan tray is removed for replacement—The fan tray is removed and replaced while the switch is
• If you remove more than one fan tray at a time, the switch can operate up to three minutes before shutting
Cisco Nexus 9516 NX-OS Mode Switch Hardware Installation Guide
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functioning. When a fan fails within a tray, the functioning fans in the module increase their speed to
compensate for the failed fans.
operating without presenting an electrical hazard or damage to the switch. The switch can operate for
three minutes without the fan tray that you are replacing, but if the switch air-inlet temperature is less
than 86 degrees Fahrenheit (30 degrees Celsius), you have up to 72 hours to replace the fan tray. Because
temperatures can change over time, we recommend that you replace the fan tray within three minutes.
down. To prevent a shutdown, remove only one fan tray at a time.
Managing the Switch
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