I Tested netplan.io 0.103-0ubuntu5~21.04.2 inside a fresh Hirsute LXD container: $ lxc launch ubuntu-daily:hirsute hh $ lxc exec hh bash
=> Enabled hirsute-proposed & installed/upgraded netplan.io root@hh:~# dpkg -l | grep netplan ii libnetplan0:amd64 0.103-0ubuntu5~21.04.2 ii netplan.io 0.103-0ubuntu5~21.04.2 root@hh:~# netplan set network.bridges.br54.dhcp4=false root@hh:~# netplan get # check that br54 is present network: bridges: br54: dhcp4: false ethernets: eth0: dhcp4: true root@hh:~# netplan apply root@hh:~# ip link show br54 && echo OK 3: br54: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN mode DEFAULT group default qlen 1000 link/ether 7a:32:79:fc:e6:a2 brd ff:ff:ff:ff:ff:ff OK root@hh:~# mkdir -p /tmp/np_backup/etc/ && cp -r /etc/netplan /tmp/np_backup/etc/ root@hh:~# netplan set network.bridges.br54=null root@hh:~# netplan get # check that br54 is NOT present network: ethernets: eth0: dhcp4: true root@hh:~# netplan apply --state /tmp/np_backup root@hh:~# ip link show br54 && echo ERROR Device "br54" does not exist. In accordance with https://wiki.ubuntu.com/NetplanUpdates I'm also attaching the full autopkgtest logs for those builds: https://git.launchpad.net/~slyon/+git/files/tree/LP1943120/hirsute_amd64.log https://git.launchpad.net/~slyon/+git/files/tree/LP1943120/hirsute_arm64.log https://git.launchpad.net/~slyon/+git/files/tree/LP1943120/hirsute_armhf.log https://git.launchpad.net/~slyon/+git/files/tree/LP1943120/hirsute_ppc64el.log https://git.launchpad.net/~slyon/+git/files/tree/LP1943120/hirsute_s390x.log The mentioned autopkgtest regression is gone after a retry. ** Tags removed: verification-needed-hirsute ** Tags added: verification-done-hirsute -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1943120 Title: interface not removed To manage notifications about this bug go to: https://bugs.launchpad.net/netplan/+bug/1943120/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs