OSPF/EIGRP Authentication

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EIGRP md5 key-chain authentication

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Note: Do on both routers; both for OSPF and both for EIGRP. Make them match and then do the ping command and or show ip interface brief command to see if links are up and up!

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R2#conf t
Enter configuration commands, one per line.  End with CNTL/Z.
R2(config)#key chain mykeychain1
R2(config-keychain)#key 1
R2(config-keychain-key)#key-string ccie
R2(config-keychain-key)#^Z
R2#
*Mar  1 00:17:29.611: %SYS-5-CONFIG_I: Configured from console by consoleconf t
Enter configuration commands, one per line.  End with CNTL/Z.
R2(config)#int fa0
R2(config-if)#ip authentication mode eigrp 100 md5
R2(config-if)#ip authentication key-chain eigrp 100 mykeychain1
R2(config-if)#
=========================================
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OSPF authentication Text or MD5 message-digest
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clear text authentication
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R1(config)#int serial 0
ip ospf authentication-key ccna
ip ospf authentication
ctrl+Z
wr
note: both routers need the same on each interface.
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MD5 authentication
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R1(config)#int s0
ip ospf authentication message-digest
ip ospf authentication message-digest-key 1 md5 ccie
ctrl+z
wr
note: both routers need the same on each interface.
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Gosh Darn it this what a lot to digets! Done OSPF!!!!!
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One Response to “OSPF/EIGRP Authentication”

  1. Congradulations,
    I’m currently studying to pass my CCNA exams, so thanks for the information.
    Sincerely,
    Phillip George

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