6To4 Tunnel Configuration Example - Extreme Networks ExtremeWare XOS Guide Manual

6to4 Tunnel Configuration Example

Figure 65 illustrates a 6to4 tunnel configured between two IPv6 regions across an IPv4 region.
Figure 65: 6to4 Tunnel Configuration Example
2002:c0a8:101::204:96ff:fe1f:a52a/48
IPv6
Router 2
2002:a00:1::1/16
2002:a00:1:1::1/64
2002:a00:1:2::1/64
In Figure 65, Router 1 has an interface to an IPv4 region with the address 192.168.1.1 (for this example
we are using private IPv4 addresses, but to tunnel across the Internet, you would use a public address).
Router 2 has an IPv4 interface of 10.0.0.1. The IPv4 interface must be created before the tunnel is
configured and cannot be deleted until the tunnel is deleted.
The IPv6 endpoints of 6to4 tunnels must follow the standard 6to4 address requirement. The address
must be of the form 2002:<IPv4_source_endpoint>::/16, where <IPv4_source_endpoint> is replaced by
the IPv4 source address of the endpoint, in hexadecimal, colon separated form. For example, for a
tunnel endpoint located at IPv4 address 10.20.30.40, the tunnel address would be 2002:0a14:1e28::/16. In
hex, 10 is 0a, 20 is 14, 30 is 1e and 40 is 28.
This example shows a simple setup on the Router 1 side (one big /48 IPv6 routing domain with no
subnets), and a slightly more complex setup on the Router 2 side (two subnets :0001: and :0002: that are
/64 in length). Hosts 1, 2, and 3 will communicate using their global 2002: addresses.
The hosts in this example configure themselves using the EUI64 interface identifier derived from their
MAC addresses. Refer to your host OS vendor's documentation for configuring IPv6 addresses and
routes.
ExtremeWare XOS 11.3 Concepts Guide
Host 1
IPv4
1
10.0.0.1/24
2
3
Tunnel Configuration Examples
Router 1
2002:c0a8:101::2/48
2
1
2002:c0a8:101::1/16
192.168.1.1/24
Host 2
2002:a00:1:1:204:96ff:fe1f:a432/64
Host 3
2002:a00:1:2:201:30ff:fe00:c200/64
IPv6
EX_109
527