If Host 2 does not respond to ICMPv6 Echo Request (this can
be verified from the Router), on Windows 7 you can run
Control Panels - Windows Firewall - Advanced Settings, then
choose Inbound rule - New Rule - Custom - All programs -
Protocol type: ICMPv6.
Remark: Probably you don't need to create a new rule.
Locate the Inbound Rules for "File and Printer Sharing (Echo
Request - ICMPV6-in), and enable the ones corresponding to
"Domain" and "Public".
[Lab] Create IPv6 Tunnels Manually.
Group students into groups. Each group has 3 or 4
Discuss the IPv6 address assignment policy in your group.
Configure your computers to establish IPv6 tunnels between
each pair of computers in your group.
There is no routing protocol yet, so you have to establish
IPv6 tunnels between each pair of computer.
Try to ping each other.
Remember that there may be hosts under your router.