EIGRP Authentication

hostname R1

key chain llavero

 key 0

  key-string cisco

interface Loopback0

 ip address 192.168.1.1 255.255.255.0

 ipv6 address FE80::1 link-local

 ipv6 address 2001:DB8:CAFE:1::1/64

!

interface Ethernet0/0

 ip address 192.168.2.1 255.255.255.252

 ipv6 address FE80::1 link-local

 ipv6 address 2001:DB8:CAFE:2::1/64

!

interface Ethernet0/1

 ip address 192.168.6.1 255.255.255.252

 ipv6 address FE80::1 link-local

 ipv6 address 2001:FB8:CAFE:6::1/64

router eigrp dual

 !

 address-family ipv4 unicast autonomous-system 4

  !

  af-interface Ethernet0/1

   authentication mode md5

   authentication key-chain llavero

  exit-af-interface

  !

  af-interface Ethernet0/0

   authentication mode hmac-sha-256 cisco

  exit-af-interface

  !

  topology base

  exit-af-topology

  network 192.168.1.0

  network 192.168.2.0 0.0.0.3

  network 192.168.6.0 0.0.0.3

  eigrp router-id 1.1.1.1

 exit-address-family

 !

 address-family ipv6 unicast autonomous-system 6

  !

  topology base

  exit-af-topology

  eigrp router-id 1.1.1.1

 exit-address-family

!