That sounds like a bug. I have only previously used vlans on top of bonds.
** Changed in: systemd (Ubuntu) Assignee: (unassigned) => Dimitri John Ledkov (xnox) -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to systemd in Ubuntu. https://bugs.launchpad.net/bugs/1738058 Title: vlan usage requires an intermediate step Status in nplan package in Ubuntu: New Status in systemd package in Ubuntu: New Bug description: If I try to apply vlans directly: network: version: 2 renderer: networkd ethernets: eth0: {} vlans: vlan1: id: 1 link: eth0 addresses: [ 192.168.0.10/23 ] vlan10: id: 10 link: eth0 addresses: [ 10.0.0.5/24 ] The vlan devices never come up, they are left in degraded state by networkd. If I define an address for eth0, then eth0 and all of the vlans will have the same address. Needless to say, this doesn't work. If I use an intermediary device instead, such as a bond: network: version: 2 renderer: networkd ethernets: eth0: {} bonds: vmaster: interfaces: [ eth0 ] vlans: vlan1: id: 1 link: vmaster addresses: [ 192.168.0.10/23 ] vlan10: id: 10 link: vmaster addresses: [ 10.0.0.5/24 ] Then the vlans are correctly applied and brought up by systemd. I think this is either a systemd bug or a netplan bug; it's possible we don't generate the config quite in the way that systemd expects it (even though it looks straightforward enough). To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nplan/+bug/1738058/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp