Perron was offered an in-person hearing from the NHL, which allowed them to suspend Perron for over five games. The NHL came to their consequence of a six game suspension due to the retaliatory nature, intent to injure, using the stick, and making contact with the head. All around, it is an awful play that deserves a harsh suspension.
However, Perron may be appealing the suspension. NHL insider Elliotte Friedman has payed out the groundwork Perron would have to take on, that begins with a direct case to commissioner Gary Bettman. Usually, with harsh suspensions, the league will stay uniform - and Bettman will likely support Player Safety's decision.