I have 2 IAPs - an IAP-105 and an IAP-215. They are both running 6.4.4.8-4.2.4.6_58505 for their respective WAP type. They both show up in the Virtual Controller interface.
However, if I have both up, clients connected to either WAP cannot connect to the Internet, but the controller sees the client connected to the WAP. If I turn either one off, clients can immediately connect to the Internet to the other one.
I am not sure where there can be a conflict. When I added the second WAP (the IAP-215), it autojoined and downloaded the config from the virtual controller, so it should not have a different config than the IAP-105.
Any ideas?