http://www.juniper.net/techpubs/en_US/junos14.1/information-products/topic-collections/release-notes/14.1/index.html?topic-83541.html
"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 10.0, 10.4, and 11.4 are EEOL releases. You can upgrade from Junos OS Release 10.0 to Release 10.4 or even from Junos OS Release 10.0 to Release 11.4. However, you cannot upgrade directly from a non-EEOL release that is more than three releases ahead or behind. For example, you cannot directly upgrade from Junos OS Release 10.3 (a non-EEOL release) to Junos OS Release 11.4 or directly downgrade from Junos OS Release 11.4 to Junos OS Release 10.3. 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 on EEOL releases and to review a list of EEOL releases, see http://www.juniper.net/support/eol/junos.html " -----Original Message----- From: juniper-nsp [mailto:[email protected]] On Behalf Of Toni Mattila Sent: Friday, May 08, 2015 7:20 AM To: [email protected] Subject: Re: [j-nsp] MX80 upgrade caveats Hi, MX80 11.4R11 -> 13.3R5 jump was at least smooth. Other than that inline-jflow PFE memleak :) Cheers, Toni On 07-May-15 23:40, COOK, MYLES wrote: > There were enough difference between 11.x and 12.x that you had to move to at > least one version of 12.x before moving past. Once you are on the 12.x code > train jumps will be a little smoother. > > -Myles C > > -----Original Message----- > From: juniper-nsp [mailto:[email protected]] On > Behalf Of Mark Tinka > Sent: Thursday, May 07, 2015 4:22 PM > To: Paul Stewart; 'thiyagarajan b'; [email protected] > Subject: Re: [j-nsp] MX80 upgrade caveats > > > On 7/May/15 22:02, Paul Stewart wrote: >> Officially I think the answer is never upgrade more than three >> releases at once .. I've cheated it and got away with it - also got burnt.... >> >> So, 11.4 to 12.1 to 12.2 to 12.3 etc..... > > If memory serves, our MX's shipped with 12, and we were able to jump > straight to 14.1. > > I can't recall which version of 12 it was, though. > > Mark. _______________________________________________ juniper-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/juniper-nsp _______________________________________________ juniper-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/juniper-nsp
