[6bone] Two IPv6 Hosts Communicating over IPv4 network

[Tony Langdon]

> > What I want is a IPv6 over IPv4 tunneling. 
> 
> Yes. Just set up a tunnel.

I agree.  I've got this Win2k machine connected to the rest of the IPv6
network here through a tunnel.  Works fine
> 
> > 1) Has such work been implemented in Linux or other OS?
> 
> Yes. On each side (the syntax is Debian, YMMV):
> 
> auto tun1
> iface tun1 inet6 v4tunnel
>    endpoint 213.248.x.y
>    address 2001:6c0:x:y:z
>    netmask 127
>    # Not mandatory but could be useful (BGP...) Use traceroute to see
>    # the length of the tunnel (9 in my case)
>    up ip tunnel change tun1 ttl 9

And the ifcfg-sit1 file for a Red Hat 7.3 box (again, for an internal tunnel
to my laptop).

[root@gw5 network-scripts]# cat ifcfg-sit1
DEVICE=sit1
BOOTPROTO=none
ONBOOT=yes
IPV6INIT=yes
IPV6TUNNELIPV4=192.168.6.201
IPV6ADDR=3ffe:b80:cb1:69::1/64

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