I have an Aruba620 with 2 x AP205 & 2 x AP105 units connected and running ArubaOS 6.4.4.1.
I'm having this same problem.
I have confirmed that under:
Configuration -> AP Configuration -> default group -> Wireless LAN -> Virtual AP -> (profile):
Basic tab:
Drop Broadcast and Unknown Multicast - OFF
Convert Broadcast ARP requests to unicast - OFF
In the AAA Profile, I have also confirmed that "Enforce DHCP" is set to OFF.
I'm connecting an ethernet device to a network via a bridge wifi device - and nothing behind the bridge gets any traffic.
Is there anything further that may stop this?