EIGRP Adjaceny Authentication

1st thing first. With any Authentication you must set your clock to be the same on every router.

clock set 10:21:00 April 4 2010

Next create your keychain (Key Number must Match)

key chain EIGRP
key 1
key-string CISCO123

Next apply your keychain
Go to the interface you want to authenticate and specify that you want authentication to be used.

ip authentication mode eigrp 100 md5
(This turns on authentication)

Next identify the keychain you wish to use.

ip authentication key-chain eigrp 100 EIGRP


****Extra Options****

!
key chain EIGRP
key 1
key-string CISCO123
accept-lifetime 00:00:00 Jan 1 1993 00:15:00 Jan 1 2007
send-lifetime 00:00:00 Jan 1 1993 00:00:00 Jan 1 2007
key 2
key-string CISCO456
accept-lifetime 23:45:00 Dec 31 2006 infinite
send-lifetime 00:00:00 Jan 1 2007 infinite
!

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