Description: Pseudo Wire Emulation Edge-to-Edge (PWE3) is an end-to-end L2 service bearing technology, that belongs to L2 VPN in the P2P mode. The system implements the PWE3 architecture through MPLS, by using the LDP or RSVP-TE protocol as signaling. Therefore, it can implement the ATM and Ethernet emulation services and establish the ATM or Ethernet private lines. Thus, it provides a solution to the emulation private line service in the IP network.