[OpenIndiana-discuss] Creating a network with zones

[Joris FAGBEMIRO]

Hi.
I want to create a bit complex network which will have one router zone
connected to four different networks.Each of these networks will have a
firewall which will be between the router zone and the other zones of these
networks.
So i have to connect the firewalls to the router and here is my
question:can i connect directly the firewalls to the router (so i should
create four VNIC on the router zone) or should i use an etherstub (virtual
switch)?More generally,my question is that:can two VNICs of different zones
be connected directly?or it's necessary to use a virtual switch?
Thanks!!!