Legacy BG clients drop connection, cannot reconnect until the AP is rebooted
Legacy NICs, b/g/n only capable, are dropping off the Wireless network and not reconnecting.
AP3825, AP3705, AP3710
Toshiba laptops with Atheros AR5007EG Wireless Adapters, driver 9/21/2009, version 220.127.116.11.
Any NIC that are 2.4 GHz only capable.
Wireless firmware 9.21.15 or .16.
Wireless firmware 10.21.03
The new enhanced congestion mechanism has introduced a more efficient queue flush process, but due to a fault in the recent 9.21.xx and 10.21.xx firmwares, the Rx paths were not restarted after a Tx queue flush.
The full fix and resolution will be available in the next Maintenance Releases: