Hi. On Thu, Jun 03, 2021 at 03:28:47PM +0200, debbug@centrum.cz wrote: It's just a guess, but you have "auto" for "bond0": > auto bond0 > iface bond0 inet manual But what you do not have is "auto" for VLAN interfaces you build on top of bond0: > iface bond0.20 inet manual > iface bond0.21 inet manual Reco