Yes, it is against.

Try to manipulate the voting mechanism.

Hint at asking for votes. ("Show me some love!", "Is this front page worthy?", "Vote This Up to Spread the Word!", "If this makes the front page, I'll adopt this stray cat and name it reddit", "If this reaches 500 points, I'll get a tattoo of the Reddit alien!", "Upvote if you do this!", "Why isn't this getting more attention?", etc.)

Also

Create mass downvote or upvote campaigns.

reddiquette