Cisco APIC Installation and ACI Upgrade and Downgrade Guide

Install or uninstall a Cisco APIC software maintenance upgrade patch using the REST API

Updated: July 12, 2026

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Provides REST API XML examples for installing or uninstalling software maintenance upgrade patches on Cisco APIC.

The following example REST API XML installs a software maintenance upgrade (SMU) patch on a Cisco Application Policy Infrastructure Controller (APIC) and reboots the Cisco APIC after the installation completes:

<polUni>
    <ctrlrInst>
        <firmwareCtrlrFwP
          version="apicpatch-CSCab12345-9.0.0-5.2.0.155d.x86_64">
        </firmwareCtrlrFwP>
        <maintCtrlrMaintP
          adminState="up" smuOperation="smuInstall" adminSt="triggered" >
        </maintCtrlrMaintP>
    </ctrlrInst>
</polUni>

The following table explains the elements and parameters that are specific to SMU patches:


Element	Parameter	Descripiton
`firmwareCtrlrFwP`	`version`	Specifies the filename of the SMU patch.
`maintCtrlrMaintP`	`smuOperation`	Specifies whether to install or uninstall the patch. The possible values are: `smuInstall`: Install the patch. `smuUninstall`: Uninstall the patch.

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