See the doc here: https://www.juniper.net/documentation/en_US/junos/information-products/topic-collections/release-notes/16.2/topic-113674.html
Please note the very important info below: Support for upgrades and downgrades that span more than three Junos OS releases at a time is not provided, except for releases that are designated as Extended End-of-Life (EEOL) releases. EEOL releases provide direct upgrade and downgrade paths—you can upgrade directly from one EEOL release to the next EEOL release even though EEOL releases generally occur in increments beyond three releases. You can upgrade or downgrade to the EEOL release that occurs directly before or after the currently installed EEOL release, or to two EEOL releases before or after. For example, Junos OS Releases 14.1, 14.2, 15.1 and 16.1 are EEOL releases. You can upgrade from Junos OS Release 14.1 to Release 15.1 or even from Junos OS Release 14.1 to Release 16.1. However, you cannot upgrade directly from a non-EEOL release that is more than three releases ahead or behind. To upgrade or downgrade from a non-EEOL release to a release more than three releases before or after, first upgrade to the next EEOL release and then upgrade or downgrade from that EEOL release to your target release. For more information about EEOL releases and to review a list of EEOL releases, see https://www.juniper.net/support/eol/junos.html. Sounds like you’ll need to go to 15.1, then 16.1, then 16.2. From: Randy Bush <ra...@psg.com> Date: Thursday, July 15, 2021 at 1:46 PM To: David Kotlerewsky <webnet...@gmail.com> Cc: heasley <h...@shrubbery.net>, Juniper List <juniper-nsp@puck.nether.net> Subject: Re: [j-nsp] upgrading an antique 240 > Good point! TSB16735 says last version of Junos to support SCB-MX960 is 16.2 > >> Junos 17.3R3-S10 >> Junos 18.4R2-S5 >> Junos 19.3R3-S2 >> Junos 19.4R3-S3 so which steps to get from 14 to 16.2? 15.x 16.2? randy _______________________________________________ juniper-nsp mailing list juniper-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/juniper-nsp
