基于Linux的一种MPLS故障恢复的设计与实现

Design and Implementation of MPLS Fault Recovery Methods Based on Linux

目前主要存在Haskin方案和Makam方案两种不同MPLS故障恢复机制。根据对二者进行分析比较,采用Makam方案,提出在静态LSP下,检测到MPLS故障时可采用的两种实现方法:一种是通过修改IP路由表来实现保护倒换;另一种是通过修改MPLS转发表实现保护倒换。依据实际的网络环境选择后者进行设计与实现,给出了具体的处理流程、相应的数据结构和修改MPLS转发表的方法。最后,对拓扑图配置Lsp进行试验,试验显示故障发生后成功保护倒换到备份Lsp,从而证明本方法的可行性和快速性。

Haskin scheme and Makam scheme are two different way＇s on MPLS fault recovery. According to the analysis and comparison t hose two way＇s, takes Makam scheme, and introduces the methods update IP router table or update MPLS forward table to implement the Makam scheme on static Lsp. Offers handling process, data structure and update MPLS forward table method. At last,config and exam the topology which pictured in article. The experiment shows that the main Lsp is switched to the backup Lap successfully, and verify that this method is practicability and quickly.