Dell SmartFabric OS10 Installation, Upgrade, and Downgrade Guide

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Downgrading OS10 software

This chapter explains how to downgrade OS10 on Dell PowerSwitches.

OS10 supports downgrading to an earlier release using the image install command. The following table lists the sections in this chapter.

NOTE:Instead of a downgrade, you can rollback to an earlier release when the previous image is available in the system as the standby image.

NOTE:(Applicable only for VLT and SFS deployments) Before you downgrade, review the information in the Dell SmartFabric OS10 certificate expiration and recommended action section.

If you have installed the new X.509v3 certificates or are currently on a release that includes the fix, downgrading to one of the affected versions will result in traffic loss. If you are downgrading to an affected release, after downgrade, you must update the certificates on all the nodes using the script (for VLT and SFS cluster convergence). You will need a maintenance window to perform this operation.
If you have installed the new X.509v3 certificates or are currently on a release that includes the fix, and are downgrading to one of the fixed releases (10.4.3.7, 10.5.0.9, 10.5.1.9, 10.5.2.6 or later), no action is required.

Table 1. Downgrade OS10Downgrade OS10
Task	Section
Downgrade to OS10 release 10.5.0.9 or earlier	Downgrade to OS10 release 10.5.0.9 or earlier
Downgrade to OS10 release 10.5.1.9 or later	Downgrade to OS10 release 10.5.1.x or later
Rollback to OS10 release 10.5.0.9 or earlier	Rollback from OS10 release 10.5.2.0 or later to 10.5.0.9 or earlier
Rollback to OS10 release 10.5.1.9 or later	Rollback from OS10 release 10.5.2.0 or later to 10.5.1.x or later

NOTE:Downgrade is not supported for IOMs in the fabric (PowerEdge MX deployments).