Max-Rate-Limit as Radius attribute?

We have deployed Radius+Mikrotik+pppoe and everything working fine. I can assign Rate-Limit (rx/tx) to my users over Radius attribute and thats ok.

But… is it possible to assign Max-Rate-Limit? For example, I want to limit my user with max download+upload=128 kbit/sec?

If that isn’t possible, is there any workaround for that problem?

it’s possible to set rate-limit=rx-rate[/tx-rate] [rx-burst-rate[/tx-burst-rate] [rx-burst-threshold[/tx-burst-threshold] [rx-burst-time[/tx-burst-time] [priority] [rx-rate-min[/tx-rate-min]]]]

I know… but i need max-rate… Any workaround? Some kinds of profiles… i don’t know… anything?