Its called a few different things, trap, 1-2-2, 2-1-2. But it's eventually all the same thing, a defensive scheme to slow/stop the on coming rush caused by turning the puck over on the dump in.
It's not how our players grew up playing. Dan is trying to teach them old school NHL grinder hockey.
Brick, meet round hole. Fit nicely please and we will have a good season.