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1·In order to ensure the reliability of MPLS network, MPLS fast Reroute (FRR) based on traffic engineering with the ability to provide fast protection and switching LSP capacity.

为了保证MPLS网络的可靠性，MPLS快速重路由技术借助MPLS流量工程的能力，为主标签交换路径(lsp)提供快速保护倒换能力。