Migration, Upgrade, and Downgrade Instructions
This section contains the upgrade and downgrade support policy for Junos OS for ACX Series routers. Upgrading or downgrading Junos OS might take several minutes, depending on the size and configuration of the network.
Starting in Junos OS release 21.2R1, all Junos OS products which were previously running on FreeBSD 11.x based Junos OS are migrated to FreeBSD 12.x based Junos OS, except EX4400. Starting with Junos OS release 21.3R1, EX4400 platforms are migrated to FreeBSD 12.x based Junos OS.
For information about software installation and upgrade, see the https://www.juniper.net/documentation/en_US/junos/information-products/pathway-pages/software-installation-and-upgrade/software-installation-and-upgrade.html Installation and Upgrade Guide.
Upgrade and Downgrade Support Policy for Junos OS Releases and Extended End-Of-Life Releases
We have two types of releases, standard EOL and EEOL:
-
Standard End of Life (EOL) releases have engineering support for twenty four months after the first general availability date and customer support for an additional six more months.
-
Extended End of Life (EEOL) releases have engineering support for thirty six months after the first general availability date and customer support for an additional six more months.
| Release Type | End of Engineering (EOE) | End of Support (EOS) | Upgrade/Downgrade to subsequent 3 releases | Upgrade/Downgrade to subsequent 2 EEOL releases |
|---|---|---|---|---|
| Standard End of Life (EOL) | 24 months | End of Engineering + 6 months | Yes | No |
| Extended End of Life (EEOL) | 36 months | End of Engineering + 6 months | Yes | Yes |
For more information about standard EOL and EEOL releases, see https://www.juniper.net/support/eol/junos.html.
For information about software installation and upgrade, see the Installation and Upgrade Guide.