64. Overlay Tunnel for IPv6 configuration experiment
1. Overlay Tunnel parsing
2. Experimental topology
3. Basic configuration
R1 configuration
Ipv6 unicast-routing
Interface Loopback0
Ipv6 address 1::1/64
Interface FastEthernet1/0
Ipv6 address 2000:12::1/64
R2 configuration
Ipv6 unicast-routing
Interface Loopback0
Ip address 2.2.2.2 255.255.255.0
Interface FastEthernet2/0
Ip address 23.1.1.2 255.255.255.0
Ip route 3.3.3.0 255.255.255.0 23.1.1.3
R3 configuration
Ipv6 unicast-routing
Interface Loopback0
Ip address 3.3.3.3 255.255.255.0
Interface FastEthernet2/0
Ip address 23.1.1.3 255.255.255.0
Ip route 2.2.2.0 255.255.255.0 23.1.1.2
R4 configuration
Ipv6 unicast-routing
Interface Loopback0
Ipv6 address 4::4/64
Interface FastEthernet1/0
Ipv6 address 2000:34::4/64
4. Configure Overlay Tunnel
R1 configuration
Interface Loopback0
Ipv6 ospf 110 area 0
Interface FastEthernet1/0
Ipv6 ospf 110 area 0
Ipv6 router ospf 110
Router-id 1.1.1.1
R2 configuration
Interface Tunnel2
Ipv6 enable
Ipv6 ospf 110 area 0
Tunnel source 2.2.2.2
Tunnel destination 3.3.3.3
Tunnel mode ipv6ip
Interface FastEthernet1/0
Ipv6 ospf 110 area 0
Ipv6 router ospf 110
Router-id 2.2.2.2
R3 configuration
Interface Tunnel3
Ipv6 enable
Ipv6 ospf 110 area 0
Tunnel source 3.3.3.3
Tunnel destination 2.2.2.2
Tunnel mode ipv6ip
Interface FastEthernet1/0
Ipv6 ospf 110 area 0
Ipv6 router ospf 110
Router-id 3.3.3.3
R4 configuration
Interface Loopback0
Ipv6 ospf 110 area 0
Interface FastEthernet1/0
Ipv6 ospf 110 area 0
Ipv6 router ospf 110
Router-id 4.4.4.4
5. Experimental test
The disadvantage of this method is that when there are multiple IPv6 networks that need to visit each other, we need to establish Tunnel between the two, which will be a lot of work.
