A provider edge( PE) is a label switching router( LSR) in multi- protocol label switching( MPLS). Such a router is located on the provider side at the transition from the provider network to the customer network.
Before transmission, the PE router determines the label switched path( LSP) through the entire MPLS network on the basis of the traffic volume. In the MPLS provider network, they are connected to other PE or P routers (providers). Provider edge routers establish the connection to the customer-side CE routers.