ipv6 questions + solaris 9

Hello everyone,

1) Is there a "decent" place where one may specify default route for IPv6?

I am doing this with a script of my own, but I wonder if there is any special 
file for this purpose (like /etc/defaultrouter for IPv4).

Assumptions: no in.ndpd (no /etc/inet/ndpd.conf), no IPv6-enabled router on the LAN.

I had a quick look at startup scripts and it seems that there is no such place, 
but maybe I am missing something.

2) Did anyone encounter this?

Aug  4 11:07:52 mars rpcbind: [ID 489175 daemon.error] Unable to join IPv6 
multicast group for rpc broadcast FF02::202
[.. unrelated stuff ..]
Aug  4 11:08:11 mars ip: [ID 603775 kern.notice] ip_queue_to_ill_v6: no ill
Aug  4 11:08:26 mars last message repeated 3 times
Aug  4 11:08:41 mars /usr/dt/bin/ttsession[454]: [ID 161973 daemon.error] 
t_connect(): System error
Aug  4 11:08:41 mars last message repeated 1 time

It happens when I configure IPv6 over IPv4 tunnel (/etc/hostname6.ip.tun* file + 
reboot). The tunnel itself works quite well, but the side-effect is like above. 
ttsession fails and I cannot launch CDE which makes the system unusable from my 
point of view.

IPv6 is enabled only on the tunnel interface. Ethernet interfaces are purely IPv4.

3) I would like to apply some filters for IPv6 traffic on the _host_ (like ipf 
for IPv4). What are my options? Any free solutions? Any stateful solutions?

4) Is there a better place to ask such questions? :)

Cheers.