(usagi-users 03549) IPv4-in-IPv6 tunnel support ...

Hello;
 
I am trying to setup an IPv4-in-IPv6 tunnel, using the "ipv6
tunnel" command, and it is not working.  I get the error "ioctl:
No such device".  I am using Usagi 2.6.12, snap 9.12.2005.
 
The command I use is:
 
"./ipv6tunnel add remote 2001:db8:4:3::2 local 2001:db8:5:6::9".
 
Is this the right command?  Should I be using "ip tunnel"?  I
tried that - no better results.
 
Remember, I want to create an IPv4-in-IPv6 tunnel.
 
Thanks very much for any pointers.
 
John Spence