X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=man%2Fsystemd-networkd.service.xml;h=91e13924888d95f63d16fa4a162d4227448f61d6;hb=edbb03e95a3c31bf719d5c6c46eec14d0bcb9c8f;hp=4cd0872b9a56c839864eac09f9b0a31afd3382dc;hpb=ae4c67a7c6bb4efb858822838efe81008c965a98;p=elogind.git diff --git a/man/systemd-networkd.service.xml b/man/systemd-networkd.service.xml index 4cd0872b9..91e139248 100644 --- a/man/systemd-networkd.service.xml +++ b/man/systemd-networkd.service.xml @@ -61,11 +61,16 @@ network devices as they appear, as well as creating virtual network devices. + To configure low-level link settings independently of + networks, see + udev7 + . + Network configurations applied before networkd is started - are not removed, and configuration applied by networkd are not - removed when networkd exits. This ensures restarting networkd - does not cut the network connection, and in particular that it - is safe to transition between the initrd and the real root, + are not removed, and static configuration applied by networkd + are not removed when networkd exits. This ensures restarting + networkd does not cut the network connection, and, in particular, + that it is safe to transition between the initrd and the real root, and back. @@ -80,18 +85,67 @@ identical filenames replace each other. Files in /etc have the highest priority, files in /run take precedence over files with the same - name in /lib. This can be used to override a + name in /usr/lib. This can be used to override a system-supplied configuration file with a local file if needed; a symlink in /etc with the same name as a configuration file in - /lib, pointing to /dev/null, + /usr/lib, pointing to /dev/null, disables the configuration file entirely. Virtual Network Devices - Netdev files must have the extension .netdev; - other extensions are ignored. Virtual network devices are created as soon - as networkd is started. + Virtual Network Device files must have the extension + .netdev; other extensions are ignored. Virtual + network devices are created as soon as networkd is started. + + A virtual network device is only created if the + [Match] section matches the current + environment, or if the section is empty. The following keys are accepted: + + + + Host + + Matches against the hostname or machine ID of the + host. See ConditionHost= in + systemd.unit5 + for details. + + + + + Virtualization + + Checks whether the system is executed in a virtualized + environment and optionally test whether it is a specific + implementation. See ConditionVirtualization= in + systemd.unit5 + for details. + + + + + KernelCommandLine + + Checks whether a specific kernel command line option is + set (or if prefixed with the exclamation mark unset). See + ConditionKernelCommandLine= in + systemd.unit5 + for details. + + + + + Architecture + + Checks whether the system is running on a specific + architecture. See ConditionArchitecture= in + systemd.unit5 + for details. + + + + - The [Bridge] section accepts the following + The [NetDev] section accepts the following keys: @@ -102,7 +156,29 @@ bridge. This option is compulsory. + + Kind + + The netdev kind. Currently, bridge, + bond and vlan + are supported. This option is compulsory. + + + + The [VLAN] section only applies for netdevs of kind vlan, + and accepts the following key: + + + + Id + + The VLAN ID to use. An integer in the range 0–4094. + This option is compulsory. + + + + Networks @@ -131,14 +207,16 @@ Path The persistent path, as exposed by the udev - property ID_PATH. + property ID_PATH. May contain shell + style globs. Driver The driver currently bound to the device, as - exposed by the udev property DRIVER. + exposed by the udev property DRIVER + of its parent device. @@ -153,7 +231,50 @@ Name The device name, as exposed by the udev property - INTERFACE. + INTERFACE. May contain shell style + globs. + + + + Host + + Matches against the hostname or machine ID of the + host. See ConditionHost= in + systemd.unit5 + for details. + + + + + Virtualization + + Checks whether the system is executed in a virtualized + environment and optionally test whether it is a specific + implementation. See ConditionVirtualization= in + systemd.unit5 + for details. + + + + + KernelCommandLine + + Checks whether a specific kernel command line option is + set (or if prefixed with the exclamation mark unset). See + ConditionKernelCommandLine= in + systemd.unit5 + for details. + + + + + Architecture + + Checks whether the system is running on a specific + architecture. See ConditionArchitecture= in + systemd.unit5 + for details. + @@ -168,14 +289,20 @@ presentation purposes. + + DHCP + + A boolean. When true, enables basic DHCPv4 support. + + Address A static IPv4 or IPv6 address and its prefix length, - separated by a '/' character. The format of the address must + separated by a / character. The format of the address must be as described in inet_pton3 - . + . This is a short-hand for an [Address] section only containing an Address key (see below). @@ -183,13 +310,34 @@ The gateway address, which must be in the format described in inet_pton3 + . This is a short-hand for a [Route] section only containing a Gateway key. + + + + DNS + + A DNS server address, which must be in the format described in + inet_pton3 . Bridge - The name of the bridge to add the configured link to. + The name of the bridge to add the link to. + + + + Bond + + The name of the bond to add the link to. + + + + VLAN + + The name of a VLAN to create on the link. This option + may be specified more than once. @@ -200,7 +348,16 @@ Address - As in the [Network] section. + As in the [Network] section. This key is mandatory. + + + + Broadcast + + The broadcast address, which must be in the format described in + inet_pton3 + . This key only applies to IPv4 addresses. If it is not given, it is + derived from the Address key. @@ -217,7 +374,7 @@ Gateway - As in the [Network] section. + As in the [Network] section. This key is mandatory. @@ -227,7 +384,42 @@ prefixlength, if ommitted a full-length host route is assumed. + + + The [DHCPv4] section accepts the following keys: + + + + UseDNS + + When true (the default), the DNS servers received from the DHCP server will + be used and take precedence over any statically configured ones. + + + + UseMTU + + When true, the interface maximum transmission unit from the DHCP server will + be used on the current link. Defaults to false. + + + + UseHostname + + When true (the default), the hostname received from the DHCP server + will be used as the transient hostname. + + + + CriticalConnection + + When true, the connection will never be torn down even if the DHCP lease + expires. This is contrary to the DHCP specification, but may be the best choice + if, say, the root filesystem relies on this connection. Defaults to false. + + +