Do we have any confirmation of a result on this issue? We are having the same issue with one of the three R600's on a site. The Master and Standby Master are showing up on our monitoring device fine, but the third AP isn't sending any SNMP information. Is there any way to log into and individual AP through the WebUI? Will I have to remove it from the house dashboard and then factory reset it?
Edit: We took the Standby-Master down yesterday to do work on the line and the slave jumped into the role as the Standby-Master, but whats strange is they have traded IP addresses and now the AP that was the Standby-Master has stopped broadcasting SNMP information!