Comment 11 for bug 876458

Have to be a bit more precise: there is an additional interface not configured at all. This interface only receives and answers dhcp queries. The other interface, which is configured is OK.

The problem seems to be interfaces which are not configured and may be up sometimes. As soon as I configure this interface, all is OK again --- no more answered queries on this interface. But I have to configure it not to answer any dhcp-queries. If I leave it unconfigured this Interface will receive dhcp-queries and answer them.

The Interface in question is configured:
auto vm2
iface vm2 inet static
  address 192.168.116.1
  netmask 255.255.255.0
  bridge_fd 3
  bridge_hello 2
  bridge_maxage 12
  bridge_stp off
  bridge_ports eth1
  pre-up brctl addbr $IFACE
  post-down brctl delbr $IFACE