systemd-networkd-wait-online.service, systemd-networkd-wait-online - Wait for
network to come online
systemd-networkd-wait-online is a oneshot system service (see
systemd.service(5)), that waits for the network to be configured. By
default, it will wait for all links it is aware of and which are managed by
systemd-networkd.service(8) to be fully configured or failed, and for
at least one link to be online. Here, online means that the link's operational
state is equal or higher than "degraded". The threshold can be
configured by --operational-state= option.
The following options are understood:
Network interface to wait for before deciding if the
system is online. This is useful when a system has several interfaces which
will be configured, but a particular one is necessary to access some network
resources. When used, all other interfaces are ignored. This option may be
used more than once to wait for multiple network interfaces. When this option
is specified multiple times, then systemd-networkd-wait-online waits
for all specified interfaces to be online. Optionally, required minimum and
maximum operational states can be specified after a colon ":".
Please see networkctl(1) for possible operational states. If the
operational state is not specified here, then the value from
RequiredForOnline= in the corresponding .network file is used if
present, and "degraded" otherwise.
Network interfaces to be ignored when deciding if the
system is online. By default, only the loopback interface is ignored. This
option may be used more than once to ignore multiple network interfaces.
Takes a minimum operational state and an optional maximum
operational state. Please see networkctl(1) for possible operational
states. If set, the specified value overrides RequiredForOnline=
settings in .network files. But this does not override operational states
specified in --interface= option.
Even if several interfaces are in configuring state,
systemd-networkd-wait-online exits with success when at least one
interface becomes online. When this option is specified with
--interface=, then systemd-networkd-wait-online waits for one of
the specified interfaces to be online. This option is useful when some
interfaces may not have carrier on boot.
Fail the service if the network is not online by the time
the timeout elapses. A timeout of 0 disables the timeout. Defaults to 120
Suppress log messages.
Print a short help text and exit.
Print a short version string and exit.