ifupdown-ng.conf - Global configuration file for ifupdown-ng

Maximilian Wilhelm <max@sdn.clinic> 2025-03-25 ifupdown-ng.conf(5)

compat_create_interfacesbool Denotes where or not to create interfaces when compat_* settings are active and it would be necessary to create an interface to be fully compliant. This could happen when inheriting bridge VLAN settings to an interface within a bridges bridge-ports setting but no interface stanza is found. Valid values are 0 and 1, the default is 1. compat_ifupdown2_bridge_ports_inherit_vlans bool In ifupdown2 <bridge-vids> as well as the <bridge-pvid> set on a bridge interface will be inherited by all member ports if not set explicitly. When set to 1 ifupdown-ng behaves the same way and will internally copy both options from the bridge member ports if they are not set on the member port. Valid values are 0 and 1, the default is 1.

ifupdown-ng allows to configure some parts of it's behaviour via global configuration options.

/etc/network/ifupdown-ng.conf

allow_addon_scriptsbool Enable support for /etc/if-X.d addon scripts. These are used for compatibility with legacy setups, and may be disabled for performance improvements in setups where only ifupdown-ng executors are used. Valid values are 0 and 1, the default is 1. auto_executor_selectionbool Automatically determine which executors to use. At present, this is done by inserting `use` statements for the namespace a config option has. The namespace is separated from the config option with a dash (`-`). Valid values are 0 and 1, the default is 1. use_hostname_for_dhcpbool Automatically learn the hostname property, used for DHCP configuration by querying the system hostname using uname(2). This is basically equivalent to `hostname $(hostname)` without having to specify any configuration. Valid values are 0 and 1, the default is 1.

ifupdown-ng.conf - Global configuration file for ifupdown-ng

interfaces(5)

allow_any_iface_as_templatebool Enable any interface to act as a template for another interface. This is presently the default, but is deprecated. An admin may choose to disable this setting in order to require inheritance from specified templates. Valid values are 0 and 1, the default is 1. implicit_template_conversionbool In some legacy configs, a template may be declared as an iface, and ifupdown-ng automatically converts those declarations to a proper template. If this setting is disabled, inheritance will continue to work against non-template interfaces without converting them to a template. Valid values are 0 and 1, the default is 1.