OSPF Key Chain
Host 에서 소프트웨어 (GNS3 등) 를 통한 네트워크 해킹 (Neighbor연결시도) 등을 방지하기 위해 사용 .
#Interface
HQ_SE_Core_R1(config-if)#ip ospf authentication message-digest
HQ_SE_Core_R1(config-if)#ip ospf message-digest-key 1 md5 123
HQ_SE_Core_R1(config-if)#ip ospf authentication
HQ_SE_Core_R1(config-if)#ip ospf authentication-key 123
#Area
HQ_SE_1F_L3_1(config-router)#area 1 authentication message-digest
HQ_SE_1F_L3_1(config-router)#area 1 authentication
-Key는 Interface에 적용
(같은 방식은 Area 와 Interface 간에 공유 가능)
Hello Debug
05:18:13: OSPF: Send hello to 224.0.0.5 area 0 on Vlan10 from 192.168.1.30
05:18:13: OSPF: Rcv hello from 192.168.1.100 area 0 from Vlan10 192.168.1.100
05:18:13: OSPF: End of hello processing
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