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路由器R1和R2分别使用GigabitEthernet0/0/0直连,并试图建立OSPF邻居,然而邻居关系并没有成功建立,排错过程如图所示。那么以下哪一个操作可以使R1和R2邻居管理正常建立? <R1>display ospf error OSPF Process 1 with Router ID 12.12.12.1 OSPF error satistics General packet errors 0 : IP: received my own packet 6 : Bad packet 0 : Bad version 0 : Bad checksum 0 : Bad area id 0 : Drop on unnumbered interface 0 : Bad virtual Link 0 : Bad authentication type 0 : Bad authentication key 0 : Packet too small 0 : Packet size > ip length 0 : Transmit error 0 : Interface down 0 : Unknown neighbor 0 : Bad net segment 0 : Extern option mismatch 0 : Router id confusion HELLO packet errors 0 : Netmask mismatch 6 : Hello timer mismatch 0 : Dead timer mismatch 0 : Virtual neighbor unknown 0 : NBMA neighbor unknown 0 : Invalid Source Address <R1>display ospf interface GigabitEthernet 0/0/0 OSPF Process with Router ID 12.12.12.1 Interfaces Interface:12.12.12.1 (GigabitEthernet0/0/0) Cost: State: DR Type: Broadcast MTU: 1500 Priority: 1 Designated Router: 12.12.12.1 Backup Designated Router: 0.0.0.0 Timers: Hello 20, Dead 80, Poll 120, Retransmit 5, Transmit Delay 1 <R2>display ospf interface GigabitEthernet 0/0/0 OSPF Process 1 with Router ID 12.12.12.2 Interfaces Interface:12.12.12.2 (GigabitEthernet0/0/0) Cost: 1 State: DR Type: Broadcast MTU: 1500 Priority: 1 Designated Router:12.12.12.2 Backup Designated Router:0.0.0.0 Timers: Hello10, Dead 40, Poll 120, Retransmit5, Transmit Delay 1(含图)