Hi,
the functionality seems arbitrary and overly specific to your use case,
also the option name "alias" does not really explain the effects of
setting this option.
IMHO you rather should write/ship a custom /etc/hotplug.d/iface/ script
which deals with downing the fallback alias interface when
The alias interfaces for interfaces with proto dhcp are very useful for
specialised builds with proto dhcp on lan by default but with backup static
addresses.
The default way has one shortage. It left backup address configured on
interface with address configured by odchp. This can lead to
