Chapter 2. Pseudowire Emulation Framework and StandardsThis chapter covers the following topics: Pseudowire emulation standardization
Chapter 1, "Understanding Layer 2 VPNs," introduced Layer 2 virtual private network (VPN) concepts and the problems it is designed to solve. It also highlighted the technology and deployment differences between Layer 2 VPNs and Layer 3 VPNs. Among the new packet-based Layer 2 VPN architectures, pseudowire emulation forms the foundation for transporting Layer 2 traffic across IP/Multiprotocol Label Switching (MPLS) networks. This chapter describes the general architecture for pseudowire emulation and networking solutions proposed in standardization organizations that sometimes compete with one another. It also highlights other Layer 2 VPN architectures that are based on pseudowire emulation. |