Ubuntu
vlan package

  1. Bug #1722534
  2. Comment #3

Comment 3 for bug 1722534

Revision history for this message
Dan Streetman (ddstreet) wrote :

oh my, ifupdown/vlan is still in use?

you appear to be doing "QinQ" (802.1ad) not 802.1q. The ifupdown/vlan 'magic' detection of vlan interface naming wasn't designed to support that; it only was designed to support 802.1q (see 'VLAN INTERFACES' here: https://manpages.debian.org/buster/ifupdown/interfaces.5.en.html )

Also, 'vlan 0' typically means 'untagged' (is it even valid to tag with id 0?), so i'm not sure what exactly you want to do with a nested vlan id 0 inside another vlan.

Finally, you should be using systemd-networkd. In Ubuntu, ifupdown has long been deprecated and is no longer officially supported.

Anyway, if you *must* do things this way, try changing your interface names to remove the dots; e.g. instead of 'ens19.1991.0' call it 'ens19_1991_0', and that should avoid all the ifupdown/vlan magic 'auto-vlan' code that tries to detect in-name vlan ids and padding.