Starts here, this is what we change to support the 501. If these don't work, then your bridge may need additional settings and you would likely need to reach out to the bridge vendor, or start doing some deep dive packet analysis to figure out what the bridge is doing.
(Aruba7005-Master) (config) #wlan virtual-ap <vap-profile>
(Aruba7005-Master) (Virtual AP profile "<vap-profile>") #no broadcast-filter arp
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(Aruba7005-Master) (config) #aaa profile <aaa-profile>
(Aruba7005-Master) (AAA Profile "<aaa-profile>") #max-ip ipv4 wireless ?
<max_ipv4_users> Number of IPv4 addr allowed. Range: 1-32. Default 2.
(Aruba7005-Master) (AAA Profile "<aaa-profile>") #max-ip ipv4 wireless 4