i use my rb4011
but when the 2.4 wireless devices over 4
i cant’t connect it any more
why
Obviously you need the RB5011. 
Wait, let me check my crystal ball… Its cloudy today can’t see much.
I know, my tarot cards are handy… drats there is cat puke on them, useless.
Hmm I know, post your config
/export hide-sensitive file=yourconfig31mar
Thank you very much. My configuration is to configure 20 virtual aps. When I connect to more than four devices, each device connects to a wireless connection, and the latter device can not be connected.
With 20 virtual APs you are probably destroying the channel with beacons. Make sure to set g/n only or change your data rates.
One should realize that stating
i use my rb4011
but when the 2.4 wireless devices over 4
i cant’t connect it any more
why?
Is NOT the same situation as I have created 20 virtual WLANS and am having issues with this setup when connecting more than four devices to (a single vLWAN or four different vLWANs etc.)
Draw a diagram as to the network setup and then there will be less confusion!
thank you very much
There is something wrong with my description
I have restored the device, so the configuration is gone, but your description is clear
four different vLWANs