Configuring Internal Power Supplies

Information About Internal Power Supplies

See the device installation guide for information about the power supplies.

How to Configure Internal Power Supplies

This section list the procedures to configure internal power supplies.

Configuring Internal Power Supply

You can use the power supply EXEC command to configure and manage the internal power supply on the device. The device does not support the no power supply EXEC command.

Follow these steps beginning in user EXEC mode:

Procedure

  Command or Action Purpose

Step 1

power supply switch_number slot {A | B } { off | on }

Example:

Device# power supply 1 slot A on

Sets the specified power supply to off or on by using one of these keywords:

  • A : Selects the power supply in slot A.

  • B : Selects power supply in slot B.

    Note

     

    Power supply slot B is the closest to the outer edge of the device.

  • off : Sets the power supply off.

  • on : Sets the power supply on.

By default, the device power supply is on.

Step 2

show environment power

Example:

Device# show environment power

Verifies your settings.

Monitoring Internal Power Supplies

Table 1. Show Commands for Power Supplies

Command

Purpose

show environment power [ all | switch switch_number ]

(Optional) Displays the status of the internal power supplies for each device in the stack or for the specified device. The range is , depending on the device member numbers in the stack.

The device keywords are available only on stacking-capable devices.

View Power Consumption

The device uses the supplied power for powering the system resources and also for Power over Ethernet (PoE). Before allocating the PoE power, the operating system allocates a specific amount of power to the system resources such as the power controllers, LEDs, chips, FPGAs, and so on. This is called budgeted power. Budgeted power shows the maximum power that is reserved for the system usage. You can check the actual power consumption and the budgeted power using the show power detail and show power module commands. These show commands also display the Instantaneous Power, Reset Power, and Peak Power.

Instantaneous Power is the power that is utilized at any given time. Peak Power is the maximum power that is consumed by the system at the time it is powered up. Reset Power indicates the amount of power the system is allocated in the reset mode.

Here is a sample output of the show power module command: 

Device# show power module

Automatic Module Shutdown : Enabled
Power Budget Mode = SP-PS
 
                           shutdown  Power                                  Out of  In
Mod  Model No              Priority  State     Budget  Instantaneous  Peak  Reset   Reset
---  --------------------  --------  --------  ------  -------------  ----  ------  -----
1    C9300-48UXM           4         accepted  575     108            108   575     50  
---  --------------------  --------  --------  ------  -------------  ----  ------  -----
Total 575

Here is a sample output of the show power detail command: 

Device# show power detail

SW  PID                 Serial#     Status           Sys Pwr  PoE Pwr  Watts
--  ------------------  ----------  ---------------  -------  -------  -----
1A  Not Present
1B  PWR-C1-1100WAC-P    DCC2505D6PZ  OK              Good     Good     1100
 
PS Configuration Mode  : SP-PS
PS Operating state     : Stndaln
 
Power supplies currently active    : 1
Power supplies currently available : 1
 
Automatic Module Shutdown : Enabled
Power Budget Mode = SP-PS
 
                           shutdown  Power                                  Out of  In
Mod  Model No              Priority  State     Budget  Instantaneous  Peak  Reset   Reset
---  --------------------  --------  --------  ------  -------------  ----  ------  -----
1    C9300-48UXM           4         accepted  575     108            108   575     50  
---  --------------------  --------  --------  ------  -------------  ----  ------  -----
Total 575
 
Power Summary          Maximum
(in Watts)    Used    Available
-------------  ------  ---------
System Power   575     575     
POE Power      150     525     
-------------  ------  ---------
Total          725     1100

Configuration Examples for Internal Power Supplies

This example shows how to set the power supply in slot A to off:

Device# power supply 1 slot A off
Disabling Power supply A may result in a power loss to PoE devices and/or switches ... Continue? (yes/[no]): yes 
Device#
Jun 10 04:52:54.389: %PLATFORM_ENV-6-FRU_PS_OIR: FRU Power Supply 1 powered off 
Jun 10 04:52:56.717: %PLATFORM_ENV-1-FAN_NOT_PRESENT: Fan is not present
Device#

This example shows how to set the power supply in slot A to on:

Device# power supply 1 slot A on
Jun 10 04:54:39.600: %PLATFORM_ENV-6-FRU_PS_OIR: FRU Power Supply 1 powered on

This example shows the output of the show env power command:

Table 2. show env power Status Descriptions
Field Description

OK

The power supply is present and power is good.

Not Present

No power supply is installed.

No Input Power

The power supply is present but there is no input power.

Disabled

The power supply and input power are present, but power supply is switched off by CLI.

Not Responding

The power supply is not recognizable or is faulty.

Failure-Fan

The power supply fan is faulty.

Additional References for Internal Power Supplies

Related Documentation

Related Topic Document Title

For complete syntax and usage information for the commands used in this chapter.

Command Reference (Catalyst 9300 Series Switches)

For information about the power supplies.

Cisco Catalyst 9300 Series Switches Hardware Installation Guide

Feature History for Internal Power Supplies

This table provides release and related information for features explained in this module.

These features are available on all releases subsequent to the one they were introduced in, unless noted otherwise.

Release

Feature

Feature Information

Cisco IOS XE Everest 16.5.1a

Internal Power Supplies

The switch operates with power supply modules which could be AC, DC or both. Refer the Hardware Installation Guide for more details on power supply units.

Cisco IOS XE Cupertino 17.8.1

Reporting System Power

show power detail and show power module commands were introduced to display the details of the system power usage.

Cisco IOS XE 17.15.1

Energy Consumption Visibility Enhancement.

New fields displaying the system energy and system meter update time were introduced in the output of the show power detail command.

Use Cisco Feature Navigator to find information about platform and software image support. To access Cisco Feature Navigator, go to https://cfnng.cisco.com/.