Angelo, I was able to connect my guests to the physical newtwork
whithout netcf.
I've added the follwing to host's /etc/network/interfaces
auto br0
iface br0 inet static
address 192.168.2.2
netmask 255.255.255.0
bridge_ports eth0
bridge_stp off
bridge_fd 0
bridge_maxwait 0
eth0 interface does not have a separate /etc/network/interfaces entry,
br0 is the interface the host is using to connect to the physical
network. The bridged interface has a static address in my case but I
think that DHCP would work also.
After a reboot, I can use the bridged interface in virt-manager. When
configuring the Virtual Network Interface for a guest, I can choose
'Host device eth0 (Bridge br0)' as the source device. With this setting,
guest can access the physical network, acquire an IP address from the
DHCP server and contact physical machines in my network and also other
guests.
It would be nice to be able to configure the bridges in the host machine
from virsh / virt-manager but it's not strictly required to get it
working :)
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https://bugs.launchpad.net/bugs/520386
Title:
libvirt-bin hypervisor does not support virConnectNumOfInterfaces /
unable to create domain with virt-manager using network bridge
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