Limit ADSL speed using radius?

[Cooper, Tom]

Hi all,

How can one limit the ADSL speed on a per customer basis using 
freeradius? I have been trying a
radiusReplyItem: Microtik-Rate-Limit += 512k/1024k, which people 
recommend, but it does not look like it is working. I have been surfing 
the freeradius wiki for days now but no luck. I am using
freeradius2-2.1.12-3.el5.

Regards,
To read FirstRand Bank's Disclaimer for this email click on the following address or copy into your Internet browser: 
https://www.fnb.co.za/disclaimer.html 

If you are unable to access the Disclaimer, send a blank e-mail to
firstrandbankdisclaimer at fnb.co.za and we will send you a copy of the Disclaimer.