Missing parent 'lxdbr0' for nic 'eth0'

[tomp (Thomas Parrott)]

I’ve replied to your post here:

Parent device “lxdbr0" doesn’t exist

lxc launch ubuntu:16.04 rv it gets created and running lxc launch ubuntu:18.04 mca after installing Error: Failed preparing container for start: Failed to start device “eth0”: Parent device “lxdbr0” doesn’t exist And if I stop that running container in first step ,it won’t start again and shows the same error mentioned. using : Ubuntu 21.04