RADIUS Disconnect-Messages

RouterOS General
1

Hi every One
How to make the radius Server to send Disconnect-Message to my Router, when PPTP Client’s Traffic is reached to its limit.
I have MYSQL and i send my traffic information via Netflow, I Use Radius Server for authentication and accounting. I need do disconnect My users sending Disconnect-Message from radius Server
What Advises ???

2

echo “Acct-Session-Id=8100000c” > packet.txt
echo “User-Name=gtr” >> packet.txt
echo “Framed-IP-Address = 10.12.255.248” >> packet.txt

cat packet.txt | radclient -x 192.168.50.180:1701 disconnect 123