Just a warning to users out there. Upgraded a set of 10 and nothing but problems. Wireless disconnections, high latency, reboots would solve for an hour or two then fail again.
RBN-576 Apple client, connected to r201 through 2.4 GHz radio loses connectivity.
Was having this same problem on 5ghz, with a 2016 macbook pro. iPhones continued to work.
Basically skip this firmware. Don't waste your time on it.