Application tools to maximize download speed

I've tried googling for some tool that i'm looking for. Not sure if my keyword is right or not.

But I'm looking for a tool to test the bandwidth of my premise. I've set a certain threshold to alert the operations if the download speed exceeds 75% of 100MBPS. I need a tool to maximize/exhaust the internet download speed so i can test the alarm.

Any tools/software out there?