gistfile1.txt

# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
auto eth0
iface eth0 inet static
  address 97.107.128.165
  netmask 255.255.255.0
  gateway 97.107.128.1

auto eth0:0
iface eth0:0 inet static
  address 192.168.140.104
  netmask 255.255.128.0

auto henet-tunnel
iface henet-tunnel inet6 v4tunnel
  address 2001:470:1f06:21d::2
  netmask 64
  local 97.107.128.165
  endpoint 209.51.161.14
  gateway 2001:470:1f06:21d::1

gistfile2.txt

mwalling@youtoo:/etc/network$ sudo ifup -vv henet-tunnel
Configuring interface henet-tunnel=henet-tunnel (inet6)
run-parts --verbose /etc/network/if-pre-up.d
run-parts: executing /etc/network/if-pre-up.d/wireless-tools
modprobe -Q ipv6
Failed to bring up henet-tunnel.