R1#sh run
Building configuration...

Current configuration : 1232 bytes
!
version 12.2
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R1

!
key chain R1
 key 1
  key-string bosco
!
!

interface Ethernet0/1
 ip address 17.57.100.1 255.255.255.0
 ip authentication mode eigrp 100 md5
 ip authentication key-chain eigrp 100 R1
 half-duplex
!
interface Serial0/1
 no ip address
 shutdown
!
router eigrp 100
 network 17.0.0.0
 network 208.28.1.0
 neighbor 208.28.1.3 Serial0/0.1
 neighbor 208.28.1.2 Serial0/0.1
 no auto-summary
!

!
line con 0
 exec-timeout 0 0
 logging synchronous
line aux 0

R1#
RACK98AS>4
[Resuming connection 4 to r4 ... ]

R4#sh run | b routre
R4#sh run | b router
router eigrp 100
 network 17.0.0.0
 no auto-summary
!

R4#
RACK98AS>6
[Resuming connection 6 to r6 ... ]

S6#sh run | b key
key chain Prob3
 key 1
  key-string bosco
spanning-tree mode pvst
spanning-tree extend system-id
!
!
!

interface Vlan16
 ip address 17.57.100.2 255.255.255.0
 ip authentication mode eigrp 100 md5
 ip authentication key-chain eigrp 100 Prob3
!
router eigrp 100
 network 17.0.0.0
 no auto-summary
 no eigrp log-neighbor-changes
!
ip classless
ip http server
!
!
line con 0
 exec-timeout 0 0
line vty 0 4
 login
line vty 5 15
 login
!
!
end

S6#