running 18.04 I am trying to bridge a wireless LAN adapter so I can extend the network to KVM without routing any of the wireless traffic on the host - all using netplan. here is my config:
network: version: 2 renderer: networkd wifis: wlxnnnnnnnn: dhcp4: no dhcp6: no access-points: mySSID: password: 'mySuperSecretPass' bridges: br3: interfaces: [wlxnnnnnnnn] dhcp4: false dhcp6: false mtu: 1500
br3 doesn't show up in KVM so I manually added it to my host's NIC in the GUI. tcpdump on the host shows dhcp requests from my VM to br3, but not making the jump from br3 to wlxnnnnnnnn. wlxnnnnnnnn sees other gratuitous arps and such from wireless devices.