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4主要配置命令示例为了进一步说明MPLSVPN的工作原理，本章将以Cisco路由器为例，对PE、P、跨域VPN的主要配置命令进行说明，示例的网络拓扑如图6所示。（1）PE路由器配置GuangzhouPE配置郾郾郾郾郾郾郾郾hostnameGuangzhou－PEipcefipvrfVPN1／*配置VPN1的vrf，包括RD和输入／
4 Examples of Main Configuration Commands To further illustrate the working principle of MPLS VPN, this chapter uses the Cisco router as an example to describe the main configuration commands for PE, P, and inter-AS VPNs. An example network topology is shown in Figure 6. (1) PE router configuration GuangzhouPE configuration 郾 郾 郾 郾 郾 郾 郾 郾 hostnameGuangzhou-PEipcefipvrfVPN1 / * Configure vrf of VPN1, including RD and input /