A.1812 B.1813 C.1999 D.137
A.該端口壞了 B.該端口被關(guān)閉了,管理員忘了在該端口下敲如no shutdown C.該端口超載了 D.該端口沒有配置路由協(xié)議
A.display isis peer B.display isis neighbor C.show isis neighbor D.show clns neighbor