The Eric rope is an inauthentic, but traditional SCA term, referring to the rope that surrounds a list field. It originated at events in the early days of the West Kingdom. Because the rope used was red, it was referred to as Eric the Red, and the term just stuck. In fact, some people have taken it so far to refer to the list field as 'The Eric'.
The regional use of this term is subject to InterKingdom Anthropology