[Openswan Users] IPv6 on netkey stack

[Ozai]

Dear Sirs,

I can setup the ipv6 tunnel successfully.But I try to ping between 
peer-to-peer.The traffic did not seem to pass through this tunnel.
Does anyone have an idea on this question?thank's.
Here's my configuration looks like:

Best Regards,
Ozai

# cat ipsec.conf
config setup
                nat_traversal=no
                oe=off
                protostack=netkey
                interfaces=%defaultroute

conn t1
                left=2000:db98:1000:0:2e03:699e:e58:8716
                leftsubnet=2002:7788:a0e9:6f02::/64
                right=2000:db98:1000:0:7eaf:95f5:b33c:b61e
                rightsubnet=2002:7788:a0e9:1fbb::/64
                connaddrfamily=ipv6
                pfs=yes
                keyexchange=ike
                ike=3des-md5;modp1024
                salifetime=480m
                phase2=esp
                phase2alg=3des-hmac_md5
                ikelifetime=60m
                dpdaction=restart
                dpddelay=180
                dpdtimeout=5
                type=tunnel
                authby=secret
                auto=add
# cat ipsec.secrets
2000:db98:1000:0:2e03:699e:e58:8716 2000:db98:1000:0:7eaf:95f5:b33c:b61e : 
PSK "123"
#