Juniper Networks J-Series Configuring Boot Devices, User@host request system software rollback

J-series™ Services Router Administration Guide

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

To downgrade software with the CLI:

1.Enter the request system software rollback command to return to the previous JUNOS software version:

user@host> request system software rollback

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

2.Reboot the router:

user@host> request system reboot

The router is now running the previous version of the software.

Configuring Boot Devices

You can configure a boot device to replace the primary boot device on your Services Router, or to act as a backup boot device. The backup device must have a storage capacity of at least 256 MB. Use either the J-Web interface or the CLI to take a snapshot of the configuration currently running on the router, or of the original factory configuration and a rescue configuration, and save it to an alternate medium.

NOTE: For media redundancy, we recommend that you keep a secondary storage medium attached to the Services Router and updated at all times.

If the primary storage medium becomes corrupted and no backup medium is in place, you can recover the primary compact flash from a special JUNOS software image. You can also configure a boot device to store snapshots of software failures, for use in troubleshooting.

For information about installing boot devices, see the Getting Started Guide for your router.

This section contains the following topics:

■Configuring a Boot Device for Backup with the J-Web Interface on page 186

■Configuring a Boot Device for Backup with the CLI on page 189

■Configuring a Boot Device to Receive Software Failure Memory Snapshots on page 190

Configuring a Boot Device for Backup with the J-Web Interface

You can use the J-Web interface to create a boot device for the Services Router on an alternate medium, to replace the primary boot device or serve as a backup.

186■ Configuring Boot Devices