HP-UX IPv6 Transport Administrator's Guide for TOUR 2.0 (April 2004, rev 2)

Configuration
Manual Configuration
Chapter 3 29
To create an IP6-in-IP tunnel, enter:
ifconfig iptu0 inet6 tunnel ip6inip tsrc 192.1.1.1 tdst
192.2.2.2 up
To create a “6to4” tunnel, enter:
ifconfig iptu0 inet6 tunnel 6to4 2002:f0e:8cc::1 tsrc
15.13.1.2 up
NOTE Remember that configuration using ifconfig and route is ephemeral,
and not maintained after a system reboot.