I've recently been setting up what I would hope would be a not too uncommon configuration, and seem to be encountering an unfortunate interaction between bridging and bonding. My configuration is: * eth0 and eth1: Physical network adapters connected to the same switched network. * bond0: active-backup bonding device slaving together eth0 and eth1 * bond0.11: VLAN interface on top of the above * br0: Bridge to which bond0.11 is added. And then I am starting KVM virtual machines, which obtain their network connectivity via tap interfaces, which are added to br0. I see intermittent connectivity problems from the VMs, which manifest when the bridge becomes confused, and erroneously learns that the VM MAC address is present on the bond0.11 port of the bridge. I have discovered that this occurs when the VM sends an ethernet broadcast - e.g. ARP query. It seems that the ethernet broadcast re-enters the machine on the backup bonding interface, and on reaching the bridge, causes it to inappropriately learn that the virtual machine is on the physical network side of the bridge. Can anyone suggest any way to address this problem? Thanks, Max.
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