You can use monitoring (graphing, SNMP, Traffic-flow). Set queue without limitation for each client, configure graphing and monitor, which user uses your network most.
If you want to stop users from downloading, when quota is reached, you need to use HotSpot/PPPoE.
i have configured Hotspot. Now i want to make quota limit for my user. How can i??? do i need to extra radius server machine?? is it possible without extra radius server machine???
limit-bytes-in (integer; default: “0”) : maximal amount of bytes can be received from user, user is disconnected from HotSpot after limit is reached
limit-bytes-out (integer; default: “0”) : maximal amount of bytes can be transmitted from user, user is disconnected from HotSpot after limit is reached
limit-bytes-total (integer; default: “0”) : (limit-bytes-in+limit-bytes-out), user is disconnected from HotSpot after limit is reached
limit-uptime (time; default: “0s”) : uptime limit for the HotSpot client, user is disconnected from HotSpot as soon as uptime is reached