DMVPN Phase 1

Phase 1

Hub & Spoke Topology with EIGRP

R1

!
hostname R1
!
interface Loopback0
 ip address 1.1.1.1 255.255.255.255
!
interface Tunnel100
 ip address 10.1.1.1 255.255.255.0
 no ip redirects
 no ip split-horizon eigrp 100
 ip nhrp network-id 100
 tunnel source GigabitEthernet0/0
 tunnel mode gre multipoint
!
interface GigabitEthernet0/0
 ip address 200.1.1.1 255.255.255.0
 duplex auto
 speed auto
 media-type rj45
!
router eigrp 100
 network 1.1.1.1 0.0.0.0
 network 10.1.1.0 0.0.0.255
!
ip route 0.0.0.0 0.0.0.0 200.1.1.4
!
end

R2

!
hostname R2
!
interface Loopback0
 ip address 2.2.2.2 255.255.255.255
!
interface Tunnel100
 ip address 10.1.1.2 255.255.255.0
 ip nhrp network-id 100
 ip nhrp nhs 10.1.1.1
 ip nhrp registration timeout 5
 tunnel source GigabitEthernet0/0
 tunnel destination 200.1.1.1
!
interface GigabitEthernet0/0
 ip address 200.2.2.2 255.255.255.0
 duplex auto
 speed auto
 media-type rj45
!
router eigrp 100
 network 2.2.2.2 0.0.0.0
 network 10.1.1.0 0.0.0.255
!
ip route 0.0.0.0 0.0.0.0 200.2.2.4
!
end

R3

!
hostname R3
!
interface Loopback0
 ip address 3.3.3.3 255.255.255.255
!
interface Tunnel100
 ip address 10.1.1.3 255.255.255.0
 ip nhrp network-id 100
 ip nhrp nhs 10.1.1.1
 ip nhrp registration timeout 5
 tunnel source GigabitEthernet0/0
 tunnel destination 200.1.1.1
!
interface GigabitEthernet0/0
 ip address 200.3.3.3 255.255.255.0
 duplex auto
 speed auto
 media-type rj45
!
router eigrp 100
 network 3.3.3.3 0.0.0.0
 network 10.1.1.0 0.0.0.255
!
ip route 0.0.0.0 0.0.0.0 200.3.3.4
!
end

R4 (Underlay)

!
hostname R4
!
interface GigabitEthernet0/0
 ip address 200.1.1.4 255.255.255.0
 duplex auto
 speed auto
 media-type rj45
!
interface GigabitEthernet0/1
 ip address 200.2.2.4 255.255.255.0
 duplex auto
 speed auto
 media-type rj45
!
interface GigabitEthernet0/2
 ip address 200.3.3.4 255.255.255.0
 duplex auto
 speed auto
 media-type rj45
!
interface GigabitEthernet0/3
 no ip address
 duplex auto
 speed auto
 media-type rj45
!
!
router eigrp 100
 network 0.0.0.0
!
end