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.
The PE router determines the label switched path (LSP) through the complete MPLS network based on the traffic volume before transmission. 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.