> ifupdown never does anything for interfaces that aren't listed in
> /etc/network/interfaces
Yes, and it doesn't matter, because interfaces not listed in /etc/network/interfaces have no impact on the 'static-network-up' event being issued from /etc/network/if-up.d/upstart. *Only* interfaces that are statically configured via /e/n/i are waited for.
> ifupdown never does anything for interfaces that aren't listed in interfaces
> /etc/network/
Yes, and it doesn't matter, because interfaces not listed in /etc/network/ interfaces have no impact on the 'static-network-up' event being issued from /etc/network/ if-up.d/ upstart. *Only* interfaces that are statically configured via /e/n/i are waited for.