Tradition-al protocols include OSPF,IS-IS and P-NNI. In this pa per,the model of optical layer routing protocol,the ex pansion of tradition al routing protocols and their spe-cific de sign are discussed.

• 传统的路由协议包括了OSPF,IS-IS和P-NNI协议,这里则讨论了光层路由协议的模型,对传统路由协议的扩展,以及路由协议的具体设计三个方面。