Router 1

interface GigabitEthernet0/1
 description VLAN2 Voice interface
 bandwidth 999999
 ip address 172.16.100.1 255.255.240.0
 no ip redirects
 ip authentication mode eigrp 100 md5
 ip authentication key-chain eigrp 100 R1
 ip pim sparse-mode
 ip nat inside
 no ip virtual-reassembly
 ip summary-address eigrp 100 65.115.188.0 255.255.255.128 5
 ip igmp static-group 224.0.1.1
 no ip mroute-cache
 duplex full
 speed 1000
 media-type rj45
 no negotiation auto
end

MACNGAMTRTR01#sh run int g0/3
Building configuration...

Current configuration : 282 bytes
!
interface GigabitEthernet0/3
 ip address 172.32.255.17 255.255.255.252
 ip authentication mode eigrp 100 md5
 ip authentication key-chain eigrp 100 R1
 ip summary-address eigrp 100 65.115.188.0 255.255.255.128 5
 duplex auto
 speed auto
 media-type rj45
 no negotiation auto
end



----------------------


Router 2

MACNGAMTRTR02#sh run int gigabitEthernet 0/1
Building configuration...

Current configuration : 272 bytes
!
interface GigabitEthernet0/1
 description Vlan 2 Voice Interface
 bandwidth 999999
 ip address 172.16.100.7 255.255.240.0
 ip authentication mode eigrp 100 md5
 ip authentication key-chain eigrp 100 R2
 duplex auto
 speed auto
 media-type rj45
 no negotiation auto
end

MACNGAMTRTR02#sh run int gigabitEthernet 0/3
Building configuration...

Current configuration : 221 bytes
!
interface GigabitEthernet0/3
 ip address 172.32.255.18 255.255.255.252
 ip authentication mode eigrp 100 md5
 ip authentication key-chain eigrp 100 R2
 duplex auto
 speed auto
 media-type rj45
 no negotiation auto
end