Chris Neil’s first-ever playoff goal 1:17 into overtime gave Ottawa the victory and evened the best-of-seven series at 1-1.
Brian Boyle scored just 2:41 into the third period to give New York the 3-2. The Senators responded late in the third period when Nick Foligno shot a bouncing puck off of Zenon Konopka to tie the score at 2-2 with just 4:37 left in regulation.
Anton Stralman had New York's other goal. Erik Karlsson also scored for Ottawa.
The game was marred by penalties, and both Brandon Dubinsky of the Rangers and Matt Carkner of Ottawa received game misconducts barely two minutes into the contest.
Game 3 will be played Monday night in Ottawa. Game 4 will also be in Ottawa Wednesday, with the series returning to New York for Game 5 on Saturday.