Comment 2 for bug 1401880

We narrowed down the culprit to the VLAN tagging on the bond0 interface: we switched the machines to an access port which solved the problem for now.

VLAN tagging used to work for us in 1.06, so probably the breaking change was probably introduced in 1.10 or 1.20 (we tried 1.20 and 1.99+git+9917937-1+syseleven6 and they both broke in the manner described above).