Equipped creature gets +2/+0, has vigilance, and is a Knight in addition to its other types.
Whenever equipped creature attacks, create a 2/2 white Knight creature token with vigilance that's attacking.
You choose which player or planeswalker the token is attacking. It doesn’t have to be attacking the same player or planeswalker that the equipped creature is attacking.
Although the token is attacking, it was never declared as an attacking creature (for the purposes of abilities that trigger whenever a creature attacks, for example).