ISATAP (Intrasite Automatic Tunnel Addressing Protocol)
ISATAP provide unicast IPv6 connectivity between IPv6/IPv4 hosts on an IPv4 intranet, which are also known as ISATAP hosts.
Work at router computer
disable IPv6 forwarding and advertising
netsh interface ipv6 set interface "192.168.1.1" forwarding=disabled advertise=disabled
netsh interface ipv6 set interface "192.168.11.7" forwarding=disabled advertise=disabled
Restart all the client computers
All the IPV6 Global Addresses are gone.
Work on Windows 2008 router
netsh interface isatap set state enabled
netsh interface isatap set router 192.168.1.1
netsh interface isatap set router 192.168.11.7
Netsh interface ipv6 show interface
netsh interface ipv6 set interface 12 forwarding=enabled advertise=enabled
netsh interface ipv6 add route 2001:0:0:1::/64 12 publish=yes
netsh interface ipv6 set interface 15 forwarding=enabled advertise=enabled
netsh interface ipv6 add route 2001:0:0:2::/64 15 publish=yes
For computers at 192.168.11.0/24 subnet,
netsh interface isatap set state enabled
HOSTS file
192.168.11.7 isatap
For computers at 192.168.1.0/24 subnet,
netsh interface isatap set state enabled
Add a line to the HOSTS file
192.168.1.1 isatap
Restart all host computers
Vista machine has the IPV6 global address assigned to ISATAP interface.
2003 machine has the IPv6 global address assigned to ISATAP interface.
From Vista machine to ping the 2003 machine:
ping 2001::2:0:5efe:192.168.11.120 -- success
From 2003 machine to ping Vista machine
ping 2001::1:0:5efe:192.168.1.3 --success
6to4 tunnels IPv6 traffic over IPv4 traffic through 6to4 router. 6to4 is intended for Internet, whereas ISATAP is for intranet.