启用RIPv2的认证 R2(config)#key chain xia R2(config-keychain)#key 1 R2(config-keychain-key)#ke R2(config-keychain-key)#key-string xiajiang R2(config-keychain-key)#end R2(config)#interface s0/0 R2(config-if)#ip r R2(config-if)#ip ri R2(config-if)#ip rip tri R2(config-if)#ip rip triggered R2(config-if)#ip rip authentication key-chain xia R2(config-if)#exit R2(config)#interface serial 0/1 R2(config-if)#ip rip authentication key-chain xia R2(config-if)#ip rip triggered R2(config-if)# R3(config)#key chain xia R3(config-keychain)#key 1 R3(config-keychain-key)#key-string xiajiang R3(config-keychain-key)#exit R3(config-keychain)#exit R3(config)#interface serial 0/1 R3(config-if)#ip rip authentication key-chain xia R3(config-if)#ip rip triggered R3(config-if)#exit R3(config)#interface serial 0/2 R3(config-if)#ip rip authentication key-chain xia R3(config-if)#ip rip triggered R3(config-if)# R4(config)#key chain xia R4(config-keychain)#key 1 R4(config)#interface serial 0/2 R4(config-if)#ip rip authentication key-chain xia R4(config-if)#ip rip triggered R4(config-if)# R4(config-if)#no s R4(config-if)#no sh R4(config-if)#no shutdown R4(config-if)#exit
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