Tim's Technology Journey Wiki

1. Create a tunnel interface on bos1

   1. interface Tunnel0
        ip address 172.30.30.1 255.255.255.0

2. Add private network to routing protocol.

   1. router eigrp 30
        network 172.30.30.0

3. Identify NHRP network-id (like an OSPF area 0).

   1. interface Tunnel0
        ip nhrp network-id 30

4. Allow multicast traffic to traverse DMVPN infrastructure.

   1. interface Tunnel0
        ip nhrp map multicast dynamic

5. Add a tunnel source.

   1. interface Tunnel0
        tunnel source GigabitEthernet0/2

6. Tunnel source is the IP to connect to the NHRP network-id 30.
   1. Aka: the public facing interface.
7. Define mode to operate tunnel in.

   1. interface Tunnel0
        tunnel mode gre multipoint

8. Tunnel will come up.
9. Now spokes can be added.

• NHRP Spoke configuration:

1. Create a tunnel interface on tpa1

   1. interface Tunnel0
        ip address 172.30.30.2 255.255.255.0

2. Add private network to routing protocol.

   1. router eigrp 30
        network 172.30.30.0

3. Define NHRP network-id.

   1. interface Tunnel0
        ip nhrp network-id 30

4. Define tunnel address of the NHRP server (hub).

   1. interface Tunnel0
        ip nhrp nhs 172.30.30.1

5. Map NHRP server address to publicly reachable IP.

   1. interface Tunnel0
        ip nhrp map 172.30.30.1 10.0.30.1

6. Send all multicast traffic to the public IP only.

   1. interface Tunnel0
        ip nhrp map multicast 10.0.30.1

7. Add a tunnel source

   1. interface Tunnel0
        tunnel source GigabitEthernet0/2

      1. Tunnel source is the IP to connect to the NHRP network-id 30.
      2. Aka: the public facing interface.
8. Define mode to operate tunnel in.

   1. interface Tunnel0
        tunnel mode gre multipoint

9. Tunnel will come up.
10. Repeat NHRP Spoke configuration on each spoke
11. To verify:

    1. show ip eigrp nei

       1. Shows neighborship of NHRP Hub at 172.30.30.1.

    2. show ip route eigrp

       1. Shows that EIGRP has learned additional routes through the tunnel interface.

    3. traceroute {IP of spoke}

       1. Can see hops a packet takes to reach a destination.
12. To allow spoke to spoke communication with EIGRP, split horizon needs to be disabled on the NHRP Hub.

    1. interface Tunnel0
           no ip split-horizon eigrp 30

13. Now the spokes go through the hub to reach another spoke.
14. This behavior can be modified to allow spoke to spoke communication without going through the hub.

1. Configure hub

   1. interface Tunnel0
        no ip next-hop-self eigrp 30

2. Now packets will flow spoke to spoke without using the hub as a next hop. This creates a dynamic spoke to spoke Phase 2 tunnel and allows a more efficient way for spokes to communicate with each other.

• pe1
  • Config

    hostname pe1
    no ip domain lookup
    !
    interface Loopback0
     ip address 192.168.0.1 255.255.255.255
    !
    interface GigabitEthernet0/0
     description mgmt-sw-1;g0/0
     ip address 10.255.0.1 255.255.0.0
     no shutdown
    !
    interface GigabitEthernet0/1
     description ny1;site-1;10.0.0.2/30;g0/1
     ip address 10.0.0.1 255.255.255.252
     no shutdown
    !
    interface GigabitEthernet0/2
     description co1;site-2;10.0.0.6/30;g0/1
     ip address 10.0.0.5 255.255.255.252
     no shutdown
    !
    interface GigabitEthernet0/3
     description ga1;site-3;10.0.0.10/30;g0/1
     ip address 10.0.0.9 255.255.255.252
     no shutdown
    !
    interface GigabitEthernet0/4
     description tn1;site-4;10.0.0.14/30;g0/1
     ip address 10.0.0.13 255.255.255.252
     no shutdown
    !
    interface GigabitEthernet0/5
     description tx1;site-5;10.0.0.18/30;g0/1
     ip address 10.0.0.17 255.255.255.252
     no shutdown
    !
    router ospf 1
     network 10.0.0.1 0.0.0.0 area 0
     network 10.0.0.5 0.0.0.0 area 0
     network 10.0.0.9 0.0.0.0 area 0
     network 10.0.0.13 0.0.0.0 area 0
     network 10.0.0.17 0.0.0.0 area 0
    !
    line con 0
     exec-timeout 0 0
     logging synchronous
     end
    !
    wr

• ny1
  • Config

    hostname ny1
    no ip domain lookup
    !
    interface Loopback0
     ip address 192.168.1.1 255.255.255.255
    !
    interface GigabitEthernet0/0
     description mgmt-sw-1;g0/1
     ip address 10.255.1.1 255.255.0.0
     no shutdown
    !
    interface GigabitEthernet0/1
     description pe1;10.0.0.1/30;g0/1
     ip address 10.0.0.2 255.255.255.252
     no shutdown
    !
    interface GigabitEthernet0/2
     description ny2;10.0.1.2/30;g0/1
     ip address 10.0.1.1 255.255.255.252
     no shutdown
    !
    router eigrp 30
     network 10.0.1.1 0.0.0.0
     network 192.168.1.1 0.0.0.0
    !
    router ospf 1
     network 10.0.0.2 0.0.0.0 area 0
    !
    line con 0
     exec-timeout 0 0
     logging synchronous
     end
    !
    wr

• ny2
  • Config

    hostname ny2
    no ip domain lookup
    !
    interface Loopback0
     ip address 192.168.1.2 255.255.255.255
    !
    interface GigabitEthernet0/0
     description mgmt-sw-1;g0/3
     ip address 10.255.1.2 255.255.0.0
     no shutdown
    !
    interface GigabitEthernet0/1
     description ny1;10.0.1.1/30;g0/2
     ip address 10.0.1.2 255.255.255.252
     no shutdown
    !
    router eigrp 30
     network 10.0.1.2 0.0.0.0
     network 192.168.1.2 0.0.0.0
    !
    line con 0
     exec-timeout 0 0
     logging synchronous
     end
    !
    wr

• co1
  • Config

    hostname co1
    no ip domain lookup
    !
    interface Loopback0
     ip address 192.168.2.1 255.255.255.255
    !
    interface GigabitEthernet0/0
     description mgmt-sw-2;g0/0
     ip address 10.255.2.1 255.255.0.0
     no shutdown
    !
    interface GigabitEthernet0/1
     description pa1;10.0.0.5/30;g0/2
     ip address 10.0.0.6 255.255.255.252
     no shutdown
    !
    interface GigabitEthernet0/2
     description co2;10.0.2.2/30;g0/1
     ip address 10.0.2.1 255.255.255.252
     no shutdown
    !
    router eigrp 30
     network 10.0.2.1 0.0.0.0
     network 192.168.2.1 0.0.0.0
    !
    router ospf 1
     network 10.0.0.6 0.0.0.0 area 0
    !
    line con 0
     exec-timeout 0 0
     logging synchronous
     end
    !
    wr

• co2
  • Config

    hostname co2
    no ip domain lookup
    !
    interface Loopback0
     ip address 192.168.2.2 255.255.255.255
    !
    interface GigabitEthernet0/0
     description mgmt-sw-2;g0/3
     ip address 10.255.2.2 255.255.0.0
     no shutdown
    !
    interface GigabitEthernet0/1
     description co1;10.0.2.1/30;g0/2
     ip address 10.0.2.2 255.255.255.252
     no shutdown
    !
    router eigrp 30
     network 10.0.2.2 0.0.0.0
     network 192.168.2.2 0.0.0.0
    !
    line con 0
     exec-timeout 0 0
     logging synchronous
     end
    !
    wr

• ga1
  • Config

    hostname ga1
    no ip domain lookup
    !
    interface Loopback0
     ip address 192.168.3.1 255.255.255.255
    !
    interface GigabitEthernet0/0
     description mgmt-sw-2;g0/1
     ip address 10.255.3.1 255.255.0.0
     no shutdown
    !
    interface GigabitEthernet0/1
     description pe1;10.0.0.9/30;g0/3
     ip address 10.0.0.10 255.255.255.252
     no shutdown
    !
    interface GigabitEthernet0/2
     description ga2;10.0.3.2/30;g0/1
     ip address 10.0.3.1 255.255.255.252
     no shutdown
    !
    router eigrp 30
     network 10.0.3.1 0.0.0.0
     network 192.168.3.1 0.0.0.0
    !
    router ospf 1
     network 10.0.0.10 0.0.0.0 area 0
    !
    line con 0
     exec-timeout 0 0
     logging synchronous
     end
    !
    wr

• ga2
  • Config

    hostname ga2
    no ip domain lookup
    !
    interface Loopback0
     ip address 192.168.3.2 255.255.255.255
    !
    interface GigabitEthernet0/0
     description mgmt-sw-2;g1/0
     ip address 10.255.3.2 255.255.0.0
     no shutdown
    !
    interface GigabitEthernet0/1
     description ga1;10.0.3.1/30;g0/2
     ip address 10.0.3.2 255.255.255.252
     no shutdown
    !
    router eigrp 30
     network 10.0.3.2 0.0.0.0
     network 192.168.3.2 0.0.0.0
    !
    line con 0
     exec-timeout 0 0
     logging synchronous
     end
    !
    wr

• tn1
  • Config

    hostname tn1
    no ip domain lookup
    !
    interface Loopback0
     ip address 192.168.4.1 255.255.255.255
    !
    interface GigabitEthernet0/0
     description mgmt-sw-2;g0/2
     ip address 10.255.4.1 255.255.0.0
     no shutdown
    !
    interface GigabitEthernet0/1
     description pe1;10.0.0.13/30;g0/4
     ip address 10.0.0.14 255.255.255.252
     no shutdown
    !
    interface GigabitEthernet0/2
     description tn2;10.0.4.2/30;g0/1
     ip address 10.0.4.1 255.255.255.252
     no shutdown
    !
    router eigrp 30
     network 10.0.4.1 0.0.0.0
     network 192.168.4.1 0.0.0.0
    !
    router ospf 1
     network 10.0.0.14 0.0.0.0 area 0
    !
    line con 0
     exec-timeout 0 0
     logging synchronous
     end
    !
    wr

• tn2
  • Config

    hostname tn2
    no ip domain lookup
    !
    interface Loopback0
     ip address 192.168.4.2 255.255.255.255
    !
    interface GigabitEthernet0/0
     description mgmt-sw-2;g1/1
     ip address 10.255.4.2 255.255.0.0
     no shutdown
    !
    interface GigabitEthernet0/1
     description tn1;10.0.4.1/30;g0/2
     ip address 10.0.4.2 255.255.255.252
     no shutdown
    !
    router eigrp 30
     network 10.0.4.2 0.0.0.0
     network 192.168.4.2 0.0.0.0
    !
    line con 0
     exec-timeout 0 0
     logging synchronous
     end
    !
    wr

• tx1
  • Config

    hostname tx1
    no ip domain lookup
    !
    interface Loopback0
     ip address 192.168.5.1 255.255.255.255
    !
    interface GigabitEthernet0/0
     description mgmt-sw-1;g0/2
     ip address 10.255.5.1 255.255.0.0
     no shutdown
    !
    interface GigabitEthernet0/1
     description pe1;10.0.0.17/30;g0/5
     ip address 10.0.0.18 255.255.255.252
     no shutdown
    !
    interface GigabitEthernet0/2
     description tx2;10.0.5.2/30;g0/1
     ip address 10.0.5.1 255.255.255.252
     no shutdown
    !
    router eigrp 30
     network 10.0.5.1 0.0.0.0
     network 192.168.5.1 0.0.0.0
    !
    router ospf 1
     network 10.0.0.18 0.0.0.0 area 0
    !
    line con 0
     exec-timeout 0 0
     logging synchronous
     end
    !
    wr

• tx2
  • Config

    hostname tx2
    no ip domain lookup
    !
    interface Loopback0
     ip address 192.168.5.2 255.255.255.255
    !
    interface GigabitEthernet0/0
     description mgmt-sw-1;g1/0
     ip address 10.255.5.2 255.255.0.0
     no shutdown
    !
    interface GigabitEthernet0/1
     description tx1;10.0.5.1/30;g0/2
     ip address 10.0.5.2 255.255.255.252
     no shutdown
    !
    router eigrp 30
     network 10.0.5.2 0.0.0.0
     network 192.168.5.2 0.0.0.0
    !
    line con 0
     exec-timeout 0 0
     logging synchronous
     end
    !
    wr