The 7962 is by now an ancient AP, and might not be supported by the firmware you're intending to upgrade to. Answering _Part_ of your question, yes the Firmware for the ZD caries new FW for the APs. APs are then systematically upgraded, provisioned and rebooted. As for APs, I think that's more of a discovery and needs analysis issue. Do you have POE? how bout 30w of PoE AT? if so, get an R610, got a super dense concert venue you are trying to provide Signal to AND PoH? R720. I personally like R710's for their outstanding range and performance, and low-ish power consumption (PoE AT, 30w).
Best of Luck!
If you upgrade the ZD, the APs will also be upgraded and the wifi service is interrupted for your users. This should be done during a maintenance window.
The ZF7962 are only supported until version 9.8 (latest 18.104.22.168.58). Make sure that the new version you choose for the ZD3000 is not more than 9.8.
There are no recommended APs for ZD3000. You have to make sure that the firmware version you choose is compatible with the AP models: for example if you use 9.8.x. you can use ZF7962 but you cannot use R710 model APs.
If you buy a ZF7982 or R700 which is running 9.9 and approve it on your ZD running 9.8, this AP will join the ZD and will downgrade to 9.8.
Thanks for your responses! Another question, so we did a hard
reset on a 7962 and it brought the firmware back to 22.214.171.124.21, and the
controller is at 126.96.36.199, but the controller is not detecting the controller
automatically. Is this due to the difference in the firmware (15/21)?