To display the current power supply configuration, use the
show environment power
command.
Note
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
functioning. When a fan fails within a tray, the functioning fans in the module increase their speed to
compensate for the failed fans.
• The fan tray is removed for replacement—The fan tray is removed and replaced while the switch is
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.
• If you remove more than one fan tray at a time, the switch can operate up to three minutes before shutting
down. To prevent a shutdown, remove only one fan tray at a time.
Cisco Nexus 9516 NX-OS Mode Switch Hardware Installation Guide
58
Managing the Switch
Overview of Fan Trays