# /etc/init/hold-interfaces.conf

start on starting network-interface and started mark-configured

instance holding${INTERFACE:+/}${INTERFACE:-}

task

exec :

start on network-rules-ready

task

exec :

# /etc/init/configure_interfaces.conf

start on local-filesystems

task

script
    find_and_mount_local_hard_disk # abbreviated
    install_stored_rules_and_other_network_configurations # abbreviated

    udevadm control --reload-rules

    # Stop all active network-interface upstart jobs (with data from old rules)
    stop_active_network_interface_jobs # abbreviated, using: initctl stop network-interface <interface>

    # Allow next network-interface jobs
    # (with data from stored rules) to complete.
    initctl emit --no-wait network-rules-ready

    # Trigger udev recognition.
    udevadm trigger --action='add' --subsystem-match='net'
end script