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文中设计了支持MPLS流量工程的标记边缘路由器LER(LabelEdgeRouter)体系结构,对显式路由计算、MPLS信令协议以及包转发机制等进行了详细讨论。LER流量工程组件通过对现有路由器结构的改造,利用合适的显式路由ER(ExplicitRoute)算法,可以在ISP骨干网上提供负载均衡,实施MPLS流量工程。
In this paper, LER (LabelEdgeRouter) architecture is designed to support MPLS traffic engineering. The explicit route calculation, MPLS signaling protocol and packet forwarding mechanism are discussed in detail. The LER traffic engineering component rebuilds the existing router structure and utilizes the explicit explicit route ER (ExplicitRoute) algorithm to provide load balancing and implement MPLS traffic engineering on the ISP backbone network.