[R1-isis-1]is-level level-1//配置R1路由级别为level-1 [R1-isis-1]q [R1]int lo0//开启接口isis功能 [R1-LoopBack0]isis ? circuit-level Set ISIS level for the interface配置接口level等级 cost Set the interface cost for ISIS配置isiscost值默认10 enable Enable ISIS processing开启接口isis功能...