I have a laptop that has wifi and cable. The ethernet
interface is called
enp0s21f5 and I need to have it
under a bridge to be able to connect tap/tun from
virtual machines. The networking is configured
iface br0 inet dhcp
bridge_stp off to avoid the learning phase of the bridge where
dhcp would hold for 30 seconds)..
The problem I try to solve is the case where the
network cable is not connected and I boot up. I already decreased the timeout in the systemd scripts. However I want to make it use
allow-hotplug br0 doesnt seem to work because the event is on
Question: Is there some howto that describe howto setup the networking definition to handle this kind of setup? I understand that I would need to trigger a script on plugin/plugoff of ethernet cable that would configure my bridge setup. Maybe with
allow-hotplug enp0s21f5 and
auto br0 iface br0 inet manual bridge_ports enp0s21f5 bridge_stp off allow-hotplug enp0s21f5 iface enp0s21f5 inet manual post-up brscript.sh post-down brscript.sh
or similar? Because this is a standard scenario I wonder weather there is such a brscript.sh script already? Or is there some other way to do it?