J-series Upgrade and Downgrade Instructions

In JUNOS Release 8.5, the JUNOS software was extended to use FreeBSD version 6.1. As a result, the following requirements apply when you upgrade your routing platform to JUNOS Release 8.5 and later:

• For J-series, M-series, MX-series, and T-series routing platforms, the minimum requirement for installation media (such as a compact flash disk, internal flash disk, or PC Card) is 256 MB.

This section contains the following topics:

• Upgrade and Downgrade Overview
• Before You Begin
• Downloading Software Upgrades from Juniper Networks
• Cleaning Up Files and Removing the Swap Partition
• Installing Software Upgrades Using the J-Web Interface
• Installing Software Upgrades with the CLI
• Downgrade Instructions