We have many X-Box 360 devices on the network, but we occasionally run across a few that just won't connect.
I re-solved this problem today and thought I should document it here in the forums.
PROBLEM
X-Box 360 with a/b/g/n adapter won't connect to campus SSID
SYMPTOMS
-X-BOX never completes the network test, sits in the blinking dots between the XBox and AP
-show ap association client-mac <mac> does not show the client
-show station table does not show the client.
-debug-user log shows no entries for the client
-Client may have previously connected once or several times before
-problem may be reported as this just suddenly stoped working
ISSUE
Certain X-Box 360 a/b/g/n will not connect if band steering is enabled on the VAP
Occasionally the client may connect and then stay connected until a restart
SOLUTION
This is a client failure and there are no "solutions" only workarounds.
Turn of band steering
switch to a wired connection
replace the adapter with a b/g/n adapter
We are looking into seeing if this is a problem related only to the adapter card and if a newer/different card will correct the issue.
Our user had a Datel Xbox 360 Wireless N Network Adapter identified as AS159 & AS161 on the back.