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Upgrade and Downgrade Instructions for JUNOS Software Release 9.3 for SRX-series Services Gateways
This section discusses the following topic:
Upgrade Policy for JUNOS Software Extended End-Of-Life Releases
An expanded upgrade and downgrade path is now available for the JUNOS Software Extended End-of-Life (EEOL) releases. You can upgrade directly from one EEOL release to one of two adjacent later EEOL releases. You can also downgrade directly from one EEOL release to one of two adjacent earlier EEOL releases.
For example, JUNOS Software Releases 8.5, 9.3, 10.0, and 10.4 are all EEOL releases. You can upgrade from JUNOS Software Release 8.5 directly to either 9.3 or 10.0. To upgrade from Release 8.5 to 10.4, you first need to upgrade to JUNOS Software release 9.3 or 10.0, and then upgrade a second time to 10.4. Similarly, you can downgrade directly from JUNOS Software Release 10.4 to either 10.0 or 9.3. To downgrade from release 10.4 to 8.5, you first need to downgrade to 10.0 or 9.3, and then perform a second downgrade to Release 8.5.
For upgrades and downgrades to or from a non-EEOL release, the current policy is that you can upgrade and downgrade by no more than three releases at a time. This policy remains unchanged.
For more information on EEOL releases and to review a list of EEOL releases, see http://www.juniper.net/support/eol/junos.html.
