当网络ospf出现邻居down告警，cisco设备哪个命令能列出与邻居路由器邻接状态（）

A.show ip traffic
B.show ip flow cache
C.show ip cache
D.None of the above

A.debug ospf events
B.show ip ospf border-routers
C.show ip ospf neighbor
D.show ip ospf database

A.Very reliable forwarding
B.Virtual routing forwarding instances
C.Vip redundancy features
D.Virtual routing format