IP网络生存性研究综述

Overview of IP Network Survivability

随着交互式应用和各种实时业务的增长对网络生存性要求的提高,IP网络的生存性研究受到了越来越多的关注。本文首先对IP网络生存性面临的问题以及影响因素作了概括,并且对目前有关纯IP网络生存性、MPLS网络生存性、IP网络与底层的生存性协调研究作了归纳总结,尤其对纯IP网络的生存性研究现状从多方面进行了比较详细的介绍,最后指出IP网络的快速重路由机制具有很好的实际应用潜力,保护恢复能力和服务质量在MPLS网络中的结合、动态多层保护则是未来IP骨干网生存性维护的发展方向。

Optical network survivability has been a hot topic of research for a long time. However, it is only recently that network survivability has attracted the attention of large research community. The growth of business-critical applications is the primary driver behind this increased interest in network protection and restoration. MPLS network is connection-oriented and is the protection and restoration mechanism is easy to be configured. But most IP networks are not updated to support MPLS, so it is meaningful to study the survivability of pure IP network. There are many challenges for IP network survivability which are generalized in the paper above all. And then research on different IP network survivability and the coordination with lower layer survivability are concluded, especially the state of the art for pure IP network is introduced in detail. Finally it is indicated that IP fast rerouting is potentially efficient for implementation, the recovery and QoS considered together in MPLS network is preferred and multi-layer resilience would be the hot topic in the future.