We went from 8.5->9.1R1.8, then to 9.2R2.15, both with little or no problems. I don't know of any specific reasons to not go 8.5->9.2, but Release Notes and upgrade instructions may provide insight. Otherwise, 8.5->9.1->9.2 worked for me.
David 2009/1/4 Robert Kern <cj1...@gmail.com>: > Hi, > > We know that there is a big change from 8.4-8.5, that is why we decided to > wait a for a while. > Now we are planning to go with 9.2. We have enough free space to do an > upgrade. The question is how should we do an upgrade or what are your > experiences? Should we go directly to 9.2 ar we should do a step-by-step > upgrade --->8.5--->9.2? > > Thanks, > > Robert > > On Sun, Jan 4, 2009 at 9:48 AM, Hangu Jeong <netc...@gmail.com> wrote: > >> Hi, >> >> Refer to following instructions to upgrade to 9.2, >> >> In JUNOS Release 8.5, the JUNOS software was extended to use FreeBSD >> version 6.1. As a result, the following requirements apply when you upgrade >> your routing platform to JUNOS Release 8.5 and later: >> For J-series, M-series, MX-series, and T-series routing platforms, the >> minimum requirement for installation media (such as a compact flash disk, >> internal flash disk, or PC Card) is 256 MB. >> For M-series, MX-series, and T-series routing platforms, you must perform >> the upgrade using the jinstall package. >> >> >> http://www.juniper.net/techpubs/software/junos/junos85/rn-sw-85/m-series-mx-series-and-t-series-upgrade-and-downgrade-instructions.html#upgrade-downgrade-85 >> >> Regards, >> Hangu >> >> >> On Sat, Jan 3, 2009 at 1:52 AM, robi robi <cj1...@gmail.com> wrote: >> > >> > Hi all, >> > >> > >> > >> > plan is to upgrade our redundant-M320 boxes from Junos version 8.4 to >> 9.2. >> > We have tried the usual upgrade procedure in a lab with direct migration >> to >> > 9.2. We had quite a few problems like standby RE didn't come up at all >> (we >> > had to downgrade both REs to 8.4). >> > >> > What are your experiences with upgrading from 8.4? >> > >> > After getting not best results from lab tests, we are thinking about >> > upgrading to 8.5 and then to 9.2. What should be best practice for >> migration >> > to 9.2? >> > >> > >> > >> > Regards, >> > >> > >> > >> > Robert >> > _______________________________________________ >> > juniper-nsp mailing list juniper-nsp@puck.nether.net >> > https://puck.nether.net/mailman/listinfo/juniper-nsp >> > _______________________________________________ > juniper-nsp mailing list juniper-nsp@puck.nether.net > https://puck.nether.net/mailman/listinfo/juniper-nsp > _______________________________________________ juniper-nsp mailing list juniper-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/juniper-nsp
