`SYSTEMD_LOG_LEVEL=debug udevadm test-builtin net_setup_link /sys/class/net/<name>`
may be used to view this.
+ Hint: if a bridge interface is created without any slaves, and gains
+ a slave later, then now the bridge does not inherit slave's MAC.
+ To inherit slave's MAC, for example, create the following file:
+ ```
+ # /etc/systemd/network/98-bridge-inherit-mac.link
+ [Match]
+ Type=bridge
+
+ [Link]
+ MACAddressPolicy=none
+ ```
+
* The .device units generated by systemd-fstab-generator and other
generators do not automatically pull in the corresponding .mount unit
as a Wants= dependency. This means that simply plugging in the device