How is bandwidth limited to plan speed in PPPoE?

[rizexor]

For example is there a software limiting the speed? Or is it an hardware limit? Is there a way to bypass the limit? Eg :- 200Mbps plan to 500Mbps

I want to know how it works behind the scenes

 

[JB701]

Excitel caps speeds on their Mikrotik routers/PPPoE Servers using queues. Using a RADIUS Server to automatically configure the queues (targeting each PPPoE user) and other config.