EIGRP Authentication per Neighbor

Hello Rene
Hello NetworkLessions Team
i try today also the same topic with Ethernet Interfaces, but i didn’t understod why R3 will not make any Eigrp Neighborship.

-R1
key chain key1
key 1
key-string R1-R2

key chain key2
key 1
key-string R1-R3

interface Ethernet0/2
ip address 192.168.123.1 255.255.255.0
ip authentication mode eigrp 1 md5
ip authentication key-chain eigrp 1 key1

router eigrp 1
network 192.168.123.0


-R2
key chain key1
key 1
key-string R1-R2

interface Ethernet0/0
ip address 192.168.123.2 255.255.255.0
ip authentication mode eigrp 1 md5
ip authentication key-chain eigrp 1 key1

router eigrp 1
network 192.168.123.0


-R3
key chain key2
key 1
key-string R1-R3

interface Ethernet0/1
ip address 192.168.123.3 255.255.255.0
ip authentication mode eigrp 1 md5
ip authentication key-chain eigrp 1 key2

router eigrp 1
network 192.168.123.0

Thanks also to this Fantastic learning Platform!

Mauri