On Wed, 2013-05-29 at 01:10 +0200, Jelle de Jong wrote: > Traffic comes out the KVM quests but doesn?t come in. If I disable > bonding everything just works again. > > auto bond0 > iface bond0 inet manual > slaves eth0 eth1 > bond-mode 4 > bond-miimon 100 > pre-up /sbin/ifconfig bond0 mtu 9000 > auto eth0 > iface eth0 inet manual > mtu 900 Does this one really say mtu 900 instead of 9000? Is your eth1 up? Did you try non-kvm traffic over the bonding interface? Is the switch in LACP mode? Regards, Wilco Baan Hofman