Mikrotik Burst

Hi Guys,

Would like to get information on queues

I have a border router with one of the interface facing the WAN using BGP.

Following is our bandwidth

CIR - 160Mbps
PIR - 640Mbps

If i burst for 3 sec in a minute above my CIR it is not chargable.
So i want to implement burst-setting for the above paramenter, can someone advice

Guys, if any doubts regards my queries, please let me know