Internet的发展和数据业务的爆炸性增长对当前网络提出了更高的要求。网络将演变为IP/MPLS-over-WDM。对于这种以光网络为基础的网络构架,网络生存性问题变得尤为重要。由于以数据业务为中心的光网络至少包含IP层和光层,笔者提出了几个在多层网络生存性面临的问题,并给出了几种方案。最后,讨论了IP/MPLS--Over-WDM特有的生存性思考。 The development of the Internet and the explosive growth of data services put forward higher demands on the current network. The network will evolve into IP / MPLS-over-WDM. With this network architecture based on optical networks, the issue of network survivability becomes even more important. Because the optical network centered on data service contains at least the IP layer and the optical layer, the author puts forward several problems in the survivability of multi-layer networks and presents several solutions. Finally, the unique survivability of IP / MPLS - Over-WDM is discussed.