we have 3 Ap(with MT router) in a big hall . there are 600 0r more poeple here same time. and they want connect to our AP’s. they are free in connect to every one. can we assign to an AP that only 50 user can connect to it and if another want to connect it .it block them or … . at total every AP only have 50 user and if one user disconnect from AP and number of user be 49 user; another user can connect to AP.
Yes, you can. In Advanced tab under Wireless, there is Max Station Count (default is 2007), change it to 50.
Or from console:
/interface wireless
set 0 max-station-count=50
where 0 is number of your wlan card, (maybe 1 or 2 if you have more than 1 card)
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hi thanks.
this item is unchangeable. how can I change it?
Hi Seniors . . .
Thanks for the useful post’s answer. 
any one don,t know that how this option active?
any one don,t know that how this option active?
Are you sure the router’s wireless card is in AP-Bridge mode!?!?
Well, a problem is if you have several virtual APs … the setting is not a global setting for the hardware interface 
thanks.
my router was problem . this option is active in rb411 ah or license level 4 os