Downgrade Fabric

There are features and functions used in Arista NetVisor UNUM and Insight Analytics that are common throughout the user interface (UI). Please refer to the Common Functions section for more information on the use of these functions and features.

Downgrade Fabric provides the ability to perform Fabric downgrades and return to an earlier Boot Environment.

Selecting Manager → Fabric → Maintenance → Downgrade Fabric triggers the process.


The downgrade process uses the NetVisor OS Boot Environment (BE) on the Fabric.

Arista Networks ONLY recommends using the downgrade process in situations where an upgrade has not gone as planned, and you need to roll back to the prior version.

The downgrade process only supports downgrading the same Fabric which was in place before attempting an upgrade.

Any configurations that may have been applied post-upgrade are lost.

Please refer to the Recommended Procedure before starting a software downgrade.

You can downgrade switch software versions by selecting Downgrade Fabric

Using the left-hand navigation bar by highlighting a particular Fabric, right-clicking on that Fabric, and then selecting Downgrade Fabric.

A warning message appears explaining configurations will be lost.

NetVisor UNUM Manager - Downgrade Fabric - Warning Message

Warning: Configuration settings are lost when performing a downgrade of the software.

The dashboard displays:

Hostname Name of the device.

IP The IP address of the device.

State The current state of the device, online or offline.

Current Version The current version of the device software.

Warning: All Fabric nodes must be at the same software version to make configuration changes to a Fabric.

NetVisor UNUM Manager - Downgrade Menus

Select the applicable Boot Environment Version from the drop-down list and select the switch or switches requiring the downgrade.

The dashboard displays the selected switches, the number of rows chosen, and the total number of entries. 

Use the Clear Selection or Select All options, as required.

NetVisor UNUM Manager - Downgrade Menu and Switch Selection Options

After selecting the upgrade version click Submit to continue or Cancel to return to the previous screen without making any changes.

A backup automatically runs before the downgrade process begins.

Caution: During the downgrade process, all backups are disabled until the downgrade process is complete.

Downgrade Example

After selecting the downgrade version click Submit to continue or select Cancel to return to the previous screen without making any changes.

NetVisor UNUM Manager - Downgrade Menu and Switch Selection Options - Example

Submit Click Submit to begin the downgrade process. The switches will automatically reboot to complete the downgrade process.

The Topology dashboard displays the status of the upgrade.

NetVisor UNUM Manager - Downgrade Topology - Example

Optionally, click on the Status column entry to display a console session, providing details about the upgrade process.

NetVisor UNUM Manager -Downgrade Status Console - Example

Once the downgrade begins, the details dashboard Status updates.

Note: During the process, various notifications, including switches going offline, appear. The appearance of these messages is normal and expected behavior.

NetVisor UNUM Manager - Downgrade Details Dashboard Examples

Caution: Attempting to select an downgrade for a switch with an equal or newer version of the software results in a grayed-out menu screen, and completing the downgrade process cannot be performed.