When you upgrade the JUNOS software, the router creates a backup image of the software that was previously installed, as well as installs 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 router. If you revert to the previous image, this backup image is used, and the image of the running software is deleted. You can downgrade to only the software release that was installed on the router before the current release with this method.
Use the procedures as described in Installing Software Upgrades with the J-Web Interface and Installing Software Upgrades with the CLI and specify an older software image as the source image to be upgraded.
Downgrade the JUNOS software on the Services Router with either the J-Web interface or the CLI.
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