Cisco APIC Installation and ACI Upgrade and Downgrade Guide

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Cisco APIC Installation and ACI Upgrade and Downgrade Guide

Determine current software version

Updated: July 12, 2026

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Determine the software version that is currently running on the switches and APICs in your fabric.

Use the procedures in this section to determine the software version that is currently running on the switches and APICs in your fabric.

Procedure

1.

Determine the current software version on APICs.

Note

When upgrading a cluster, all Cisco APICs must be running the same software version to join the cluster. Automatic upgrades when joining the fabric are not available until APIC release 6.0(2). For more information, refer to Auto firmware update on APIC discovery.

You can determine the software version that is currently running on the APICs in your fabric several ways:

  • Click the System Tools icon ( ) in the upper right corner of the Cisco APIC GUI window, then select About.
  • Navigate to the Controllers page:

    • For releases prior to release 5.1(1), navigate to Admin > Firmware > Infrastructure > Controllers. The software version is shown in the Current Firmware column in the table on this page.

    • For release 5.1(1) and later, navigate to Admin > Firmware, then click Dashboard in the left navigation window. The software version is shown in the Firmware field in the Controllers area on the page.

      You can also determine the software version running on each individual APIC by locating the Controllers area in this same page. The software version running on each APIC is shown in the Current Version column.
2.

Determine the current software version on switches.

To determine the software version that is currently running on the leaf and spine switches in your fabric:

  • For releases prior to release 5.1(1), navigate to Admin > Firmware > Infrastructure > Nodes. The software version is shown in the Current Firmware column in the table on this page.
  • For release 5.1(1) and later, navigate to Admin > Firmware, then click Dashboard in the left navigation window. The software version is shown in the Firmware field in the Nodes area on the page.
  • For release 5.2(1) and later, you can also use the Node Summary tab in Admin > Firmware > Nodes.