We use this every day for wifi hotspots off a Mikrotik. It works without issues.

From: freeradius-users-bounces+wiechman.lists=gmail.com@lists.freeradius.org [mailto:freeradius-users-bounces+wiechman.lists=gmail.com@lists.freeradius.org] On Behalf Of Spacelee
Sent: Thursday, August 12, 2010 3:30 AM
To: FreeRadius users mailing list
Subject: Is Mikrotik-Rate-Limit used to limit users speed

PPTP+PPP+FreeRadius+MySQL

It seems it doesn't work.

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Spacelee