restrict bandwidth by port or IP

Hi I recently bought an 3011RB, I want to connect 6 RB951 to that router, but only gives approximately 8 down and 2up bandwidth of the available internet to each router.

My Questions are.

Can I restrict the bandwidth to each port or IP?
Is it possible.

Will the speed test on for example www.speedtest.net will display me 8MBPS down and 2 MBPS up??

Thanks for helping