ipv6 help in freeswan-1.3!!!!!

[YaNan Guo <ynguo@xxxxxxxxxxxxxxxx>]

Hello every one of u:
    I install freeswan1.3 in two machine(both installed mandrake7.0), now
i want to test ipsec used in ipv6 environment. But i search all documents
attached the freeswan, i found no test example about ipsec for ipv6. Here
is my ipv6 environment:
    one has ipv6 address 3ffe:3216:2101:1000:101::1/112(eth2 as subnet), 
                         3ffe:3216:2101:ffff::1/64(eth0 as gateway),
                         202.38.64.185/24(eth1 for ipv4);
   the other is a machine in subnet ,it has only one nic, 
                         3ffe:3216:2101:1000:101::2/112(eth0),
   these two machine can ping each other, how can i test ipsec in ipv6.
   who can tell me how to do?   thanks a lot !!!!!!!
   Best wishes!!!