When planning a ZD upgrade, start by reading the Release Notes for the version you are looking
to upgrade to. Our latest ZD1200 firmware is 10.3 (GA), Release Notes, Software found here:https://support.ruckuswireless.com/documents/2901-zonedirector-10-3-ga-release-noteshttps://support.ruckuswireless.com/software/2156-zd1200-10-3-0-0-362-ga-software-release
The RN section Upgrading to This Version, shows the minimum firmware that can directly upgrade
to 10.3 is 10.1.0.0.1515, our 10.1 (GA) release. Find 10.1 (GA) Release Notes and Firmware here:https://support.ruckuswireless.com/documents/2149-zonedirector-10-1-0-ga-release-notes https://support.ruckuswireless.com/software/1569-zd1200-10-1-0-0-1515-ga-software-release
The ZD1200 10.1.0.0.1515 also supports the T310s/n/c/d model APs, so your APs should be able
to recognize the ZD and join ok. You can then do another Backup/Upgrade to 10.3 (GA) if you want
to be on our latest, most feature rich level software.
ZoneDirector best practices are to save a Backup from your current version, and add digits into
the filename to remind you what version it came from. If you ever have to/want to downgrade, you
can restore the backup from that previous release of software. Do this with each version upgrade.
I hope this is helpful.