eigrp_lab3

发布时间：2019-08-25 09:38:40编辑：auto阅读（1321）

    拓扑图：

    配置：

    R1：

    key chain ccna
     key 1
      key-string cisco
    call rsvp-sync
    !

    interface Loopback1
     ip address 1.1.1.1 255.255.255.0
    !
    interface Serial1/0
     ip address 12.1.1.1 255.255.255.0
     ip authentication mode eigrp 1 md5
     ip authentication key-chain eigrp 1 ccna
     serial restart-delay 0
    !
    router eigrp 1
     network 1.0.0.0
     network 12.0.0.0
     no auto-summary

    R2：

    key chain ccna
     key 1
      key-string cisco
    call rsvp-sync
    !
    interface Serial1/0
     ip address 12.1.1.2 255.255.255.0
     ip authentication mode eigrp 1 md5
     ip authentication key-chain eigrp 1 ccna
     serial restart-delay 0
    !
    interface Serial1/1
     ip address 23.1.1.1 255.255.255.0
     ip authentication mode eigrp 1 md5
     ip authentication key-chain eigrp 1 ccna
     serial restart-delay 0
    !
    router eigrp 1
     network 12.0.0.0
     network 23.0.0.0
     no auto-summary
    !

    R3：

    key chain ccna
     key 1
      key-string ccie
    call rsvp-sync
    !
    interface Loopback1
     ip address 3.3.3.3 255.255.255.0
    !
    interface Serial1/0
     ip address 23.1.1.2 255.255.255.0
     ip authentication mode eigrp 1 md5
     ip authentication key-chain eigrp 1 ccna
     serial restart-delay 0
    !
    router eigrp 1
     network 3.0.0.0
     network 23.0.0.0
     no auto-summary
    !

    说明

    1.R1与R2验证是成功的，因为他们的key ID和密钥都是相同的

    2.R2和R3验证不成功，因为他们钥匙链的密钥不相同

    DUAL-5-NBRCHANGE: IP-EIGRP 1: Neighbor 23.1.1.1 (Serial1/0) is down: Auth failure

    R3#debug eigrp packet

    EIGRP:  key id = 1, authentication mismatch

    EIGRP: Serial1/0: ignored packet from 23.1.1.1, opcode = 5 (invalid authentication)

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