add port to SDN

[angry_beaver]

Hi,
I have a cluster with 3 nodes. each node has config for ether port 2

auto iso_lan
iface iso_lan inet manual
bridge-ports nic1
bridge-stp off
bridge-fd 0
#isolated

This ether port 2 / nic 1 (on each node) connected to one switch. Main network is on port 1 (nic 0)
I create ZONE, VNets in cluster, add subnet for Vnet (192.168.50.x/24). I connect 2 VM to this network - all OK, ping - OK. I need to add access point to this isolated network

So, my question is:
How can I add physical port on node to this SDN ?

Thanks,
Oleg.