Lab 209 - IPv6 Over IPv4 Using GRE Tunnel

Prerequisites: CCNP level skills.

Note!
If interfaces have not been configured with IPv6 addresses yet, use fc00:1:1::/64 as the network-ID and ::x, as a host ID (where x=router-ID).

Topology

Pic 1. IPv6 and IPv4 Topology Diagram.

Task 1

Configure IPv6 and IPv4 addresses, RIPng and EIGRP AS 1, according to the topology diagram (pic. 1 above). On R1 and SW4, advertise their loopback0 interfaces in EIGRP.

Task 2
Configure R1 and SW4 in such a way that IPv6 subnet in VLAN 215 can reach IPv6 subnets in VLANs 7, 9, 27, 79, and 99. Ensure that the tunnelling method can carry packets other than IPv6 (for instance IS-IS based on CLNS protocol). Tunnel should be based on the R1's and SW4's most stable interfaces. You can add two new IPv6 addresses to make the solution work.

Solution

Task 1
Configure IPv6 addresses, RIPng and EIGRP AS 1according to the topology diagram (pic. 1 above). On R1 and SW4, advertise their loopback0 interfaces in EIGRP.

R1 IPv4 and IPv6 Address Configuration:
!
!
interface Loopback0
 ip address 10.0.1.1 255.255.255.0
!
interface FastEthernet0/0
 ip address 192.0.2.1 255.255.255.0
 speed 100
 full-duplex
!
interface FastEthernet0/1
 no ip address
 speed 100
 full-duplex
 ipv6 address 2001:172:16:215::1/64
!

R5 IPv6 Address Configuration:
!
!
interface FastEthernet0/1
 no ip address
 speed 100
 full-duplex
 ipv6 address 2001:172:16:215::5/64
!

SW1 IPv6 Address Configuration:
!
!
interface Vlan7
 no ip address
 ipv6 address 2001:172:16:7::7/64
!
interface Vlan79
 no ip address
 ipv6 address 2001:172:16:79::7/64
!
interface Vlan107
 no ip address
 ipv6 address 2001:172:16:107::7/64
!
interface FastEthernet1/2
 no switchport
 no ip address
 duplex full
 speed 100
 ipv6 address 2001:172:16:27::7/64
!

SW2 IPv6 Address Configuration:
!
!
interface Vlan215
 no ip address
 ipv6 address 2001:172:16:215::8/64
!

SW3 IPv6 Address Configuration:
!
!
interface Vlan9
 no ip address
 ipv6 address 2001:172:16:9::9/64
!
interface Vlan79
 no ip address
 ipv6 address 2001:172:16:79::9/64
!
interface Vlan99
 no ip address
 ipv6 address 2001:172:16:99::9/64
!

SW4 IPV6 and IPv4 Address Configuration:
!
!
interface Loopback0
 ip address 10.0.10.10 255.255.255.0
!
interface Vlan107
 no ip address
 ipv6 address 2001:172:16:107::10/64
!
interface Vlan134
 ip address 192.0.2.10 255.255.255.0
!


Task 2
Configure R1 and SW4 in such a way that IPv6 subnet in VLAN 215 can reach IPv6 subnets in VLANs 7, 9, 27, 79, and 99. Ensure that the tunnelling method can carry packets other than IPv6 (for instance IS-IS based on CLNS protocol). Tunnel should be based on the R1's and SW4's most stable interfaces. You can add two new IPv6 addresses to make the solution work.

Step 1 - RIPng Between SW1, SW3, and SW4.
!
!
! SW1 Config:
!
ipv6 unicast-routing
!
ipv6 router rip CCIE
!
!
interface Vlan7
 no ip address
 ipv6 address 2001:172:16:7::7/64
 ipv6 rip CCIE enable
!
interface Vlan79
 no ip address
 ipv6 address 2001:172:16:79::7/64
 ipv6 rip CCIE enable
!
interface Vlan107
 no ip address
 ipv6 address 2001:172:16:107::7/64
 ipv6 rip CCIE enable
!
interface FastEthernet1/2
 no switchport
 no ip address
 duplex full
 speed 100
 ipv6 address 2001:172:16:27::7/64
 ipv6 rip CCIE enable
!

Verification (perform on all remainging routers):
!
SW1#show ipv6 rip
RIP process "CCIE", port 521, multicast-group FF02::9, pid 194
     Administrative distance is 120. Maximum paths is 16
     Updates every 30 seconds, expire after 180
     Holddown lasts 0 seconds, garbage collect after 120
     Split horizon is on; poison reverse is off
     Default routes are not generated
     Periodic updates 8, trigger updates 4
  Interfaces:
    FastEthernet1/2
    Vlan107
    Vlan79
    Vlan7
  Redistribution:
    None
!

! 
! SW3 Config:
!
ipv6 unicast-routing
!
ipv6 router rip CCIE
!
!
interface Vlan9
 no ip address
 ipv6 address 2001:172:16:9::9/64
 ipv6 rip CCIE enable
!
interface Vlan79
 no ip address
 ipv6 address 2001:172:16:79::9/64
 ipv6 rip CCIE enable
!

interface Vlan99
 no ip address
 ipv6 address 2001:172:16:99::9/64
 ipv6 rip CCIE enable
!

! 
! SW4 Config:
!
ipv6 unicast-routing
!
ipv6 router rip CCIE
!
!
interface Vlan107
 no ip address
 ipv6 address 2001:172:16:107::10/64
 ipv6 rip CCIE enable
!

Verification:

Pic. Ping Connectivity Verification.

Step 2 - RIPng Between R1, R5, and SW2.
!
!
! R1 Config:
!
ipv6 unicast-routing
!
ipv6 router rip CCIE
!
interface FastEthernet0/1
 no ip address
 speed 100
 full-duplex
 ipv6 address 2001:172:16:215::1/64
 ipv6 rip CCIE enable
!

!
! R5 Config:
!
!
ipv6 unicast-routing
!
ipv6 router rip CCIE
!
interface FastEthernet0/1
 no ip address
 speed 100
 full-duplex
 ipv6 address 2001:172:16:215::5/64
 ipv6 rip CCIE enable
!

!
! SW2 Config:
!
ipv6 unicast-routing
!
ipv6 router rip CCIE
!
interface Vlan215
 no ip address
 ipv6 address 2001:172:16:215::8/64
 ipv6 rip CCIE enable
!

Step 3 - EIGRP AS 1 Config:
!
!
! R1 Config:
!
router eigrp 1
 network 10.0.1.1 0.0.0.0
 network 192.0.2.1 0.0.0.0
 no auto-summary
!

!
! SW4 Config:
!
router eigrp 1
 network 10.0.10.10 0.0.0.0
 network 192.0.2.10 0.0.0.0
 no auto-summary
!

Verification:

Pic. 3 - EIGRP Adjacency.

 

Pic. 4 - Ping between Loopback (for tunnel puporses).

Step 4 - GRE Tunnel Configuration to enable IPv6 over IPv4

!
!
! R1 Config:
!
interface Tunnel0
 no ip address
 ipv6 address 2001:110::1/64
 ipv6 rip CCIE enable
 tunnel source Loopback0
 tunnel destination 10.0.10.10
!

!
!
! SW4 Config:
!
!
interface Tunnel0
 no ip address
 ipv6 address 2001:110::10/64
 ipv6 rip CCIE enable
 tunnel source Loopback0
 tunnel destination 10.0.1.1
!

Verification:

Pic. 5 - Ping Connectivity Test.