I was able to get a TrendNet device setup to allow printing. When using the wireshark capture I saw:
Ping to the IP using IGMP protocol
Pulled up the properties of the printer and saw SNMP traffic
Setup a new printer and saw TCP traffic (ACK, PSH, FIN)
When trying to connect through the Aruba device, I didn't get any of this. We've also had problems with captive portal and connectivity with some devices, mainly handheld. Our Infrastructure engineer who works with the wireless set an open Group, and still nothing.
Like I said before, we didn't have problems untill the last upgrade. I've had no resolution and we've been down since the Summer.