I am posting Hockey fight video!

Well for quite sometime I have not seen a hockey fight video, so why am I posting this now? Well same reason why you are reading this or will watch the video below. Anyways this video is pretty new  and the fight is between Giroux and  Reese.

Giroux vs. Reese fight video. 
Someone who knows hockey and not a wanna be tell me why the referee is not stopping the fight not until some one fall down, is the rule is same as boxing?!