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伪线端到端仿真(PWE3)是工程任务组(IETF)提出的一种在优化的分组交换网络(多协议标签交换网络等)基础上仿真一些网络业务(以太网、帧中继等网络业务)的二层虚拟专用网(L2VPN)协议。通过该协议可以将传统网络与分组交换网络连通起来,从而实现资源的共享和网络的拓展。着重介绍基于标签分发协议(LDP)信令实现的多段伪线技术原理、技术架构及多段伪线的应用模型,给出多段伪线的部署建议。
Pseudo-wire end-to-end simulation (PWE3) is an engineering task force (IETF) proposed in an optimized packet-switched network (Multiprotocol Label Switching Network, etc.) based on the simulation of some network services (Ethernet, Frame Relay and other network services ) Layer 2 Virtual Private Network (L2VPN) protocol. The agreement can be the traditional network and packet switched network connectivity, in order to achieve the sharing of resources and network expansion. This paper mainly introduces the principle of multi-segment pseudo-wire based on Label Distribution Protocol (LDP) signaling, the technology architecture and the application model of multi-segment pseudo-wire.