一种预先建立的MPLS快速重路由方案的设计

Design of a MPLS Based Fast-Rerouting Approach with Pre-established Protection

设计了一种针对节点保护的预先建立的多协议标签交换(Multiple Protocol Label Switching,MPLS)快速重路由的总体方案。该方案包括预先建立备份路径、故障检测、故障恢复控制、标签分发和数据包转发等几部分。首先针对工作路径上的标签交换路由器用最大流理论的最短增广路径算法搜索备份路径组。然后,设计了故障检测和恢复机制,确定了按流量的优先级和带宽需求选择备份路径的方法。最终实现MPLS快速重路由。

This paper presents a global mechanism protection. It includes the pre-construction of restoration and control, label distribution , packet path group for a MPLS router along a directed path for MPLS based fast rerouting with pre-established the backup path, failure measurement, failure forward, etc. This paper first searches the backup with the shortest augmenting path algorithm of the maximum traffic theory. We then design the mechanism of failure measurement and restoration and the backup path selection algorithm dependent on We finally achieve the MPIS based fast rerouting the priority of the flow and bandwidth on demand.