Downgrading Software on the SRX Series Services Gateways

When you upgrade your software, the device creates a backup image of the software that was previously installed in addition to installing the requested software upgrade.

To downgrade the software, you can use the backup image of the software that was previously installed, which is saved on the device. If you revert to the previous image, this backup image is used. You can use this method to downgrade to only the software release that was installed on the device before the current release.

Use the procedures described in Installing Software Upgrades on the SRX Series Services Gateways and specify an older software image as the source image to be upgraded.

Downgrade your software with either the J-Web interface or the CLI.

This topic includes the following sections:

• Downgrading Junos OS on SRX Series Services Gateways (J-Web Procedure)
• Downgrading the Junos OS on SRX Series Services Gateways (CLI Procedure)

Downgrading Junos OS on SRX Series Services Gateways (J-Web Procedure)

You can downgrade the Junos OS from the J-Web interface. For your changes to take effect, you must reboot the device.

To downgrade Junos OS with the J-Web interface:

1. In the J-Web interface, select Maintain>Software>Downgrade. The image of the previous version (if any) is displayed on this page.

   Note: After you perform this operation, you cannot undo it.

2. Select Downgrade to downgrade to the previous version of the software or Cancel to cancel the downgrade process.
3. When the downgrade process is complete, for the new software to take effect, click Maintain>Reboot from the J-Web interface to reboot the device.

   Note: To downgrade to an earlier version, follow the procedure for upgrading, using the software image labeled with the appropriate release.

Downgrading the Junos OS on SRX Series Services Gateways (CLI Procedure)

You can revert to the previous version of software using the request system software rollback command in the CLI. For the changes to take effect, you must reboot the device.

To downgrade Junos OS with the CLI:

1. Enter the request system software rollback command to return to the previous Junos OS version:
   user@host> request system software rollback

   The previous software version is now ready to become active when you next reboot the device.

2. Reboot the device:
   user@host> request system reboot

The device is now running the previous version of the Junos OS. To downgrade to an earlier version, follow the procedure for upgrading, using the software image labeled with the appropriate release.