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NAME | SYNOPSIS | DESCRIPTION | OPTIONS | SEE ALSO | COLOPHON |
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SYSTE...ERVICE(8) systemd-networkd-wait-online.service SYSTE...ERVICE(8)
systemd-networkd-wait-online.service, systemd-networkd-wait-
online@.service, systemd-networkd-wait-online - Wait for network
to come online
systemd-networkd-wait-online.service
systemd-networkd-wait-online@.service
/usr/lib/systemd/systemd-networkd-wait-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 service systemd-networkd-wait-online.service invokes
systemd-networkd-wait-online without any options. Thus, it waits
for all managed interfaces to be configured or failed, and for at
least one to be online.
The service systemd-networkd-wait-online@.service takes an
interface name, and invokes systemd-networkd-wait-online with -i
and the specified interface name. Thus, wait for the specified
interface to be configured and online. For example,
systemd-networkd-wait-online@eth0.service waits for eth0 to be
configured by systemd-networkd and online.
The following options are understood:
-i INTERFACE[:MIN_OPERSTATE[:MAX_OPERSTATE]],
--interface=INTERFACE[:MIN_OPERSTATE[:MAX_OPERSTATE]]
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.
Added in version 213.
--ignore=INTERFACE
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.
Added in version 219.
-o MIN_OPERSTATE[:MAX_OPERSTATE],
--operational-state=MIN_OPERSTATE[:MAX_OPERSTATE]
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.
Added in version 242.
-4, --ipv4
Waiting for an IPv4 address of each network interface to be
configured. If this option is specified with --any, then
systemd-networkd-wait-online exits with success when at least
one interface becomes online and has an IPv4 address. If the
required minimum operational state is below "routable", then
each link (or at least one link with --any) must have an IPv4
link-local or routable address. If the required minimum
operational state is "routable", then each link must have an
IPv4 routable address.
If neither --ipv4 nor --ipv6 is specified, then the value from
RequiredFamilyForOnline= in the corresponding .network file is
used if present.
Added in version 249.
-6, --ipv6
Waiting for an IPv6 address of each network interface to be
configured. If this option is specified with --any, then
systemd-networkd-wait-online exits with success when at least
one interface becomes online and has an IPv6 address. If the
required minimum operational state is below "routable", then
each link (or at least one link with --any) must have an IPv6
link-local or routable address. If the required minimum
operational state is "routable", then each link must have an
IPv6 routable address.
If neither --ipv4 nor --ipv6 is specified, then the value from
RequiredFamilyForOnline= in the corresponding .network file is
used if present.
Added in version 249.
--dns
Waiting for DNS servers to be accessible on each interface. If
this option is specified with --any, then
systemd-networkd-wait-online exits with success when at least
one interface becomes online and has an accessible DNS server.
If a link has the property DefaultRoute=yes (either because
the DNSDefaultRoute= network property is explicitly
configured, or because the link does not have any
"routing-only" domains), or if the search domain "." is
configured, then wait for link-specific DNS servers to be
accessible. Otherwise, allow global DNS servers to satisfy the
condition.
Added in version 258.
--any
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.
Added in version 242.
--timeout=SECS
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 seconds.
Added in version 219.
-q, --quiet
Suppress log messages.
Added in version 242.
-h, --help
Print a short help text and exit.
--version
Print a short version string and exit.
systemd(1), systemd.service(5), systemd-networkd.service(8),
networkctl(1)
This page is part of the systemd (systemd system and service
manager) project. Information about the project can be found at
⟨http://www.freedesktop.org/wiki/Software/systemd⟩. If you have a
bug report for this manual page, see
⟨http://www.freedesktop.org/wiki/Software/systemd/#bugreports⟩.
This page was obtained from the project's upstream Git repository
⟨https://github.com/systemd/systemd.git⟩ on 2025-02-02. (At that
time, the date of the most recent commit that was found in the
repository was 2025-02-02.) If you discover any rendering
problems in this HTML version of the page, or you believe there is
a better or more up-to-date source for the page, or you have
corrections or improvements to the information in this COLOPHON
(which is not part of the original manual page), send a mail to
man-pages@man7.org
systemd 258~devel SYSTE...ERVICE(8)
Pages that refer to this page: systemd.network(5), systemd.directives(7), systemd.index(7), systemd-networkd.service(8)
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HTML rendering created 2025-02-02 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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