This paper illustrate that how to implement the processing of Pseudo Wire Emulation Edge-to-Edge with Multiprotocol Label Switching technique in infrastructure. First
the principle of PWE3 and MPLS will be given. A great deal of basic details
that the operations of labels in the infrastructure of MPLS architecture
would be demonstrated secondly. However
two particular case are shown to describe a variety of operations which enable the MPLS process unit in the Label Switching Router to achieve the function of PWE3.