Upgrade and Downgrade Instructions for Junos OS Release 10.3 for SRX Series Services Gateways and J Series Services Routers

In order to upgrade to Junos OS Release 10.3 or later, your device must be running one of the following Junos OS Releases:

• 9.1S1
• 9.2R4
• 9.3R3
• 9.4R3
• 9.5R1 or later

If your device is running an earlier release, upgrade to one of these releases and then to the 10.3 release. For example, to upgrade from Release 9.2R1, first upgrade to Release 9.2R4 and then to Release 10.3.

For additional upgrade and download information, see the Junos OS Administration Guide for Security Devices and the Junos OS Migration Guide.

• Upgrade Policy for Junos OS Extended End Of Life Releases

Upgrade Policy for Junos OS Extended End Of Life Releases

A direct upgrade and downgrade path is now available for Junos OS Extended End of Life (EEOL) releases. You can upgrade directly from one EEOL release to the next release even though EEOL releases frequently occur in increments beyond three releases. The current upgrade and downgrade policy for a non-EEOL release is that you can only upgrade and downgrade by up to three releases at a time. The +3 policy remains unchanged for non-EEOL releases but includes a direct upgrade and downgrade path for EEOL to next EEOL releases

It is important to note that you can only upgrade or downgrade to the EEOL release that occurs directly before or after the currently installed EEOL release. For example, Junos OS Releases 8.5, 9.3, and 10.0 are EEOL releases. You can only upgrade from Junos OS release 8.5 to Junos OS Release 10.0 by first upgrading to Junos OS Release 9.3. This policy also applies to downgrades where you cannot skip an EEOL release but must target the EEOL release occurring directly before the currently installed EEOL release.

For more information on EEOL releases and to review a list of EEOL releases, see http://www.juniper.net/support/eol/junos.html