Nonhomogeneous networks not supported

Hi all,

I've got a 2 nodes openstack setup were I'm testing a VlanManager network: both the nodes are natty 11.04 64bit running Diablo milestone (2011.3~d3-0ubuntu0~ppa1~natty1).
One of the node runs the nova-sheduler and the nova-network services.
It has the following network related flags:
--network_manager=nova.network.manager.VlanManager
--flat_network_dhcp_start=10.12.1.1
--flat_network_dns=212.29.129.3
--fixed_range=10.12.0.0/16
--iscsi_ip_prefix=10.10.11.
--vlan_interface=eth0
--flat_interface=eth0
--public_interface=eth1

The other runs nova-compute and has the following network related flags:
--network_manager=nova.network.manager.VlanManager
--flat_network_dhcp_start=10.12.1.1
--flat_network_dns=212.29.129.3
--fixed_range=10.12.0.0/16
--iscsi_ip_prefix=10.10.11.
--vlan_interface=eth4
--flat_interface=eth4
--public_interface=eth1
--logdir=/var/log/nova
--state_path=/var/lib/nova
--verbose

If I check the registered vlan config on this node I got:
root@beta:~# nova-manage config list|grep vlan
--vlan_interface=eth4
--vlan_start=100

If i look in the nova-compute.log, at service startup i can see:
2011-08-24 10:18:59,542 DEBUG nova [-] find_host_timeout : 30 from (pid=3460) serve /usr/lib/pymodules/python2.7/nova/service.py:366
2011-08-24 10:18:59,542 DEBUG nova [-] vlan_interface : eth4 from (pid=3460) serve /usr/lib/pymodules/python2.7/nova/service.py:366
2011-08-24 10:18:59,542 DEBUG nova [-] aws_access_key_id : admin from (pid=3460) serve /usr/lib/pymodules/python2.7/nova/service.py:366

But when i deploy a vm from a project who is placed on vlan 12, in the same log I can see:
2011-08-24 10:21:45,862 DEBUG nova.linux_net [-] Starting VLAN inteface vlan12 from (pid=3460) ensure_vlan /usr/lib/pymodules/python2.7/nova/network/linux_net.py:466
2011-08-24 10:21:45,862 DEBUG nova.utils [-] Running cmd (subprocess): sudo vconfig set_name_type VLAN_PLUS_VID_NO_PAD from (pid=3460) execute /usr/lib/pymodules/python2.7/nova/utils.py:143
2011-08-24 10:21:45,907 DEBUG nova.utils [-] Running cmd (subprocess): sudo vconfig add eth0 12 from (pid=3460) execute /usr/lib/pymodules/python2.7/nova/utils.py:143
2011-08-24 10:21:45,921 DEBUG nova.utils [-] Running cmd (subprocess): sudo ip link set vlan12 up from (pid=3460) execute /usr/lib/pymodules/python2.7/nova/utils.py:143
2011-08-24 10:21:45,937 DEBUG nova.utils [-] Attempting to grab semaphore "ensure_bridge" for method "ensure_bridge"... from (pid=3460) inner /usr/lib/pymodules/python2.7/nova/utils.py:600
2011-08-24 10:21:45,937 DEBUG nova.utils [-] Attempting to grab file lock "ensure_bridge" for method "ensure_bridge"... from (pid=3460) inner /usr/lib/pymodules/python2.7/nova/utils.py:605
2011-08-24 10:21:45,938 DEBUG nova.utils [-] Running cmd (subprocess): ip link show dev br12 from (pid=3460) execute /usr/lib/pymodules/python2.7/nova/utils.py:143
2011-08-24 10:21:45,943 DEBUG nova.utils [-] Result was 255 from (pid=3460) execute /usr/lib/pymodules/python2.7/nova/utils.py:161
2011-08-24 10:21:45,944 DEBUG nova.linux_net [-] Starting Bridge interface for vlan12 from (pid=3460) ensure_bridge /usr/lib/pymodules/python2.7/nova/network/linux_net.py:489

the compute node uses eth0 to create the vlan instead of eth4.
In this case eth0 is both the default value and the controller node's vlan_interface value.
Am i missing some further flag in my nova.conf?

Thanks
Giuseppe