Configuring Internal Power Supplies

Information About Internal Power Supplies

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

How to Configure Internal Power Supplies

Configuring an Internal Power Supply

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

SUMMARY STEPS

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

    2.    show environment power


DETAILED STEPS
     Command or ActionPurpose
    Step 1 power supply switch_number slot{A | B} { off | on }


    Example: 
    Switch# 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 switch.

    • off —Set the power supply off.

    • on —Set the power supply on.

    By default, the switch power supply is on.

     
    Step 2show environment power


    Example: 
    Switch# 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 switch in the stack or for the specified switch. The range is 1 to 9, depending on the switch member numbers in the stack.

    Configuration Examples for Internal Power Supplies

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

    Switch# 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 
Switch#
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
Switch#

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

    Switch# 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:

    Switch# show env power

SW  PID                 Serial#     Status           Sys Pwr  PoE Pwr  Watts
--- ------------------  ----------  ---------------  -------  -------  -----
1A  PWR-C2-640WAC       DCB1705B05B OK               Good     Good     640
1B  Not Present

Switch#
    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

    Error Message Decoder

    Description Link

    To help you research and resolve system error messages in this release, use the Error Message Decoder tool.

    https:/​/​www.cisco.com/​cgi-bin/​Support/​Errordecoder/​index.cgi

    MIBs

    MIB MIBs Link

    All supported MIBs for this release.

    To locate and download MIBs for selected platforms, Cisco IOS releases, and feature sets, use Cisco MIB Locator found at the following URL:

    http:/​/​www.cisco.com/​go/​mibs

    Technical Assistance

    Description Link

    The Cisco Support website provides extensive online resources, including documentation and tools for troubleshooting and resolving technical issues with Cisco products and technologies.

    To receive security and technical information about your products, you can subscribe to various services, such as the Product Alert Tool (accessed from Field Notices), the Cisco Technical Services Newsletter, and Really Simple Syndication (RSS) Feeds.

    Access to most tools on the Cisco Support website requires a Cisco.com user ID and password.

    http:/​/​www.cisco.com/​support

    Feature History and Information for Internal Power Supplies

    Release

    Modification

    Cisco IOS XE 3.3SE

    This feature was introduced.