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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 peer OSPF Process 1 with Router ID 12.12.12.1 Neighbors General packet statistics 0 : received my own packet 6 : Bad packet 0 : Input queue full 0 : Drop on unnumbered interface 0 : Bad version 0 : Bad type 0 : Bad authentication key 0 : Packet too small 0 : Bad authentication type 0 : Retransmission timeout 0 : Interface down 0 : Unknown neighbor 0 : Extern option mismatch 0 : Keychain is invalid 0 : Router id confusion 0 : Helo timer mismatch HELLO packet errors 0 : Network mismatch 0 : Authentication mismatch 0 : Area mismatch 0 : Password mismatch 0 : NIMA neighbor unknown 0 : Invalid Source Address <R1>display ospf interface GigabitEthernet 0/0/0 OSPF Process 1 with Router ID 12.12.12.1 Interfaces Interface 12.12.12.1 (GigabitEthernet0/0/0) Cost : 1 State : P2P Type : P2P Priority : 1 DR : 0.0.0.0 BDR : 0.0.0.0 MTU : 1500 Backup designated Router 0.0.0.0 Timers: Hello 10 , Dead 40 , Poll 120 , Retransmit 5 , Transmit Delay 1 <R2>display ospf interface GigabitEthernet 0/0/0 OSPF Process 2 with Router ID 12.12.12.2 Interfaces Interface 12.12.12.2 (GigabitEthernet0/0/0) Cost : 1 State : DR Type : Broadcast Priority : 1 DR : 12.12.12.2 BDR : 0.0.0.0 MTU : 1500 Backup designated Router 0.0.0.0 Timers: Hello 10 , Dead 40 , Poll 120 , Retransmit 5 , Transmit Delay 1