I am not sure I have any definitivie answers but here are my thoughts. Compare a VLAN device created with `ip link add`
ip link add link enp6s0 name enp6s0.100 type vlan id 100 cat /sys/class/net/enp6s0.100/uevent DEVTYPE=vlan INTERFACE=enp6s0.100 IFINDEX=3 To an OVS VLAN interface created with ovs-vsctl: ovs-vsctl add-port br-ex vlan100 tag=200 -- set Interface vlan100 type=internal cat /sys/class/net/br-ex.100/uevent INTERFACE=br-ex.100 IFINDEX=7 I suspect this is down to the tooling. OVS is creating virtual devices so it may not be what `ip link` would create. Could the `is_vlan` function check for the '.' followed by an integer which is the indication of a VLAN in all cases? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1912844 Title: Bond with OVS bridging RuntimeError: duplicate mac found! To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/cloud-init/+bug/1912844/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs