<listitem>
<para>A whitespace-separated list of shell-style globs
matching the persistent path, as exposed by the udev
- property <literal>ID_PATH</literal>.</para>
+ property <literal>ID_PATH</literal>. If the list is
+ prefixed with a "!", the test is inverted; i.e. it is
+ true when <literal>ID_PATH</literal> does not match any
+ item in the list.</para>
</listitem>
</varlistentry>
<varlistentry>
exposed by the udev property <literal>DRIVER</literal>
of its parent device, or if that is not set the driver
as exposed by <literal>ethtool -i</literal> of the
- device itself.</para>
+ device itself. If the list is prefixed with a "!", the
+ test is inverted.</para>
</listitem>
</varlistentry>
<varlistentry>
<listitem>
<para>A whitespace-separated list of shell-style globs
matching the device type, as exposed by the udev property
- <literal>DEVTYPE</literal>.</para>
+ <literal>DEVTYPE</literal>. If the list is prefixed with
+ a "!", the test is inverted.</para>
</listitem>
</varlistentry>
<varlistentry>
<listitem>
<para>A whitespace-separated list of shell-style globs
matching the device name, as exposed by the udev property
- <literal>INTERFACE</literal>.</para>
+ <literal>INTERFACE</literal>. If the list is prefixed
+ with a "!", the test is inverted.</para>
</listitem>
</varlistentry>
<varlistentry>
<listitem>
<para>Enables DHCPv4 and/or DHCPv6 client support. Accepts
<literal>yes</literal>, <literal>no</literal>,
- <literal>ipv4</literal>, or <literal>ipv6</literal>.</para>
+ <literal>ipv4</literal>, or <literal>ipv6</literal>. Defaults
+ to <literal>no</literal>.</para>
<para>Note that DHCPv6 will by default be triggered by Router
Advertisement, if that is enabled, regardless of this parameter.
DNS validation support on the link. When set to
<literal>allow-downgrade</literal>, compatibility with
non-DNSSEC capable networks is increased, by automatically
- turning off DNSEC in this case. This option defines a
+ turning off DNSSEC in this case. This option defines a
per-interface setting for
<citerefentry><refentrytitle>resolved.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>'s
global <varname>DNSSEC=</varname> option. Defaults to
<para>This setting is read by
<citerefentry><refentrytitle>systemd-resolved.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.
"Search domains" correspond to the <varname>domain</varname> and <varname>search</varname> entries in
- <citerefentry><refentrytitle>resolv.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>.
+ <citerefentry project='man-pages'><refentrytitle>resolv.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>.
Domain name routing has no equivalent in the traditional glibc API, which has no concept of domain
name servers limited to a specific link.</para>
</listitem>
</para></listitem>
</varlistentry>
<varlistentry>
- <term><varname>ProxyARP=</varname></term>
- <listitem><para>A boolean. Configures proxy ARP. Proxy ARP is the technique in which one host,
+ <term><varname>IPv4ProxyARP=</varname></term>
+ <listitem><para>A boolean. Configures proxy ARP for IPv4. Proxy ARP is the technique in which one host,
usually a router, answers ARP requests intended for another machine. By "faking" its identity,
the router accepts responsibility for routing packets to the "real" destination. (see <ulink
url="https://tools.ietf.org/html/rfc1027">RFC 1027</ulink>.
Defaults to unset.
</para></listitem>
</varlistentry>
+ <varlistentry>
+ <term><varname>IPv6ProxyNDP=</varname></term>
+ <listitem><para>A boolean. Configures proxy NDP for IPv6. Proxy NDP (Neighbor Discovery
+ Protocol) is a technique for IPv6 to allow routing of addresses to a different
+ destination when peers expect them to be present on a certain physical link.
+ In this case a router answers Neighbour Advertisement messages intended for
+ another machine by offering its own MAC address as destination.
+ Unlike proxy ARP for IPv4, it is not enabled globally, but will only send Neighbour
+ Advertisement messages for addresses in the IPv6 neighbor proxy table,
+ which can also be shown by <command>ip -6 neighbour show proxy</command>.
+ systemd-networkd will control the per-interface `proxy_ndp` switch for each configured
+ interface depending on this option.
+ Defautls to unset.
+ </para></listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><varname>IPv6ProxyNDPAddress=</varname></term>
+ <listitem><para>An IPv6 address, for which Neighbour Advertisement messages will be
+ proxied. This option may be specified more than once. systemd-networkd will add the
+ <option>IPv6ProxyNDPAddress=</option> entries to the kernel's IPv6 neighbor proxy table.
+ This option implies <option>IPv6ProxyNDP=true</option> but has no effect if
+ <option>IPv6ProxyNDP</option> has been set to false. Defaults to unset.
+ </para></listitem>
+ </varlistentry>
<varlistentry>
<term><varname>Bridge=</varname></term>
<listitem>
- <para>The name of the bridge to add the link to.</para>
+ <para>The name of the bridge to add the link to. See
+ <citerefentry><refentrytitle>systemd.netdev</refentrytitle><manvolnum>5</manvolnum></citerefentry>.
+ </para>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>Bond=</varname></term>
<listitem>
- <para>The name of the bond to add the link to.</para>
+ <para>The name of the bond to add the link to. See
+ <citerefentry><refentrytitle>systemd.netdev</refentrytitle><manvolnum>5</manvolnum></citerefentry>.
+ </para>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>VRF=</varname></term>
<listitem>
- <para>The name of the VRF to add the link to.</para>
+ <para>The name of the VRF to add the link to. See
+ <citerefentry><refentrytitle>systemd.netdev</refentrytitle><manvolnum>5</manvolnum></citerefentry>.
+ </para>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>VLAN=</varname></term>
<listitem>
- <para>The name of a VLAN to create on the link. This
- option may be specified more than once.</para>
+ <para>The name of a VLAN to create on the link. See
+ <citerefentry><refentrytitle>systemd.netdev</refentrytitle><manvolnum>5</manvolnum></citerefentry>.
+ This option may be specified more than once.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>MACVLAN=</varname></term>
<listitem>
- <para>The name of a MACVLAN to create on the link. This
- option may be specified more than once.</para>
+ <para>The name of a MACVLAN to create on the link. See
+ <citerefentry><refentrytitle>systemd.netdev</refentrytitle><manvolnum>5</manvolnum></citerefentry>.
+ This option may be specified more than once.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>VXLAN=</varname></term>
<listitem>
- <para>The name of a VXLAN to create on the link. This
- option may be specified more than once.</para>
+ <para>The name of a VXLAN to create on the link. See
+ <citerefentry><refentrytitle>systemd.netdev</refentrytitle><manvolnum>5</manvolnum></citerefentry>.
+ This option may be specified more than once.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>Tunnel=</varname></term>
<listitem>
- <para>The name of a Tunnel to create on the link. This
- option may be specified more than once.</para>
+ <para>The name of a Tunnel to create on the link. See
+ <citerefentry><refentrytitle>systemd.netdev</refentrytitle><manvolnum>5</manvolnum></citerefentry>.
+ This option may be specified more than once.</para>
</listitem>
</varlistentry>
+ <varlistentry>
+ <term><varname>ActiveSlave=</varname></term>
+ <listitem>
+ <para>A boolean. Specifies the new active slave. The <literal>ActiveSlave=</literal>
+ option is only valid for following modes:
+ <literal>active-backup</literal>,
+ <literal>balance-alb</literal> and
+ <literal>balance-tlb</literal>. Defaults to false.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><varname>PrimarySlave=</varname></term>
+ <listitem>
+ <para>A boolean. Specifies which slave is the primary device. The specified
+ device will always be the active slave while it is available. Only when the
+ primary is off-line will alternate devices be used. This is useful when
+ one slave is preferred over another, e.g. when one slave has higher throughput
+ than another. The <literal>PrimarySlave=</literal> option is only valid for
+ following modes:
+ <literal>active-backup</literal>,
+ <literal>balance-alb</literal> and
+ <literal>balance-tlb</literal>. Defaults to false.
+ </para>
+ </listitem>
+ </varlistentry>
</variablelist>
</refsect1>
which is then configured to use them explicitly.</para>
</listitem>
</varlistentry>
+ <varlistentry>
+ <term><varname>Scope=</varname></term>
+ <listitem>
+ <para>The scope of the address, which can be <literal>global</literal>,
+ <literal>link</literal> or <literal>host</literal> or an unsigned integer ranges 0 to 255.
+ Defaults to <literal>global</literal>.</para>
+ </listitem>
+ </varlistentry>
<varlistentry>
<term><varname>HomeAddress=</varname></term>
<listitem>
</variablelist>
</refsect1>
+ <refsect1>
+ <title>[IPv6AddressLabel] Section Options</title>
+
+ <para>An <literal>[IPv6AddressLabel]</literal> section accepts the
+ following keys. Specify several <literal>[IPv6AddressLabel]</literal>
+ sections to configure several address labels. IPv6 address labels are
+ used for address selection. See <ulink url="https://tools.ietf.org/html/rfc3484">RFC 3484</ulink>.
+ Precedence is managed by userspace, and only the label itself is stored in the kernel</para>
+
+ <variablelist class='network-directives'>
+ <varlistentry>
+ <term><varname>Label=</varname></term>
+ <listitem>
+ <para> The label for the prefix (an unsigned integer) ranges 0 to 4294967294.
+ 0xffffffff is reserved. This key is mandatory.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><varname>Prefix=</varname></term>
+ <listitem>
+ <para>IPv6 prefix is an address with a prefix length, separated by a slash <literal>/</literal> character.
+ This key is mandatory. </para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
<refsect1>
<title>[Route] Section Options</title>
<para>The <literal>[Route]</literal> section accepts the
<para>As in the <literal>[Network]</literal> section.</para>
</listitem>
</varlistentry>
+ <varlistentry>
+ <term><varname>GatewayOnlink=</varname></term>
+ <listitem>
+ <para>The <literal>GatewayOnlink</literal> option tells the kernel that it does not have
+ to check if the gateway is reachable directly by the current machine (i.e., the kernel does
+ not need to check if the gateway is attached to the local network), so that we can insert the
+ route in the kernel table without it being complained about. A boolean, defaults to <literal>no</literal>.
+ </para>
+ </listitem>
+ </varlistentry>
<varlistentry>
<term><varname>Destination=</varname></term>
<listitem>
<para>The metric of the route (an unsigned integer).</para>
</listitem>
</varlistentry>
+ <varlistentry>
+ <term><varname>IPv6Preference=</varname></term>
+ <listitem>
+ <para>Specifies the route preference as defined in <ulink
+ url="https://tools.ietf.org/html/rfc4191">RFC4191</ulink> for Router Discovery messages.
+ Which can be one of <literal>low</literal> the route has a lowest priority,
+ <literal>medium</literal> the route has a default priority or
+ <literal>high</literal> the route has a highest priority.</para>
+ </listitem>
+ </varlistentry>
<varlistentry>
<term><varname>Scope=</varname></term>
<listitem>
</para>
</listitem>
</varlistentry>
+ <varlistentry>
+ <term><varname>Protocol=</varname></term>
+ <listitem>
+ <para>The Protocol identifier for the route. Takes a number between 0 and 255 or the special values
+ <literal>kernel</literal>, <literal>boot</literal> and <literal>static</literal>. Defaults to
+ <literal>static</literal>.
+ </para>
+ </listitem>
+ </varlistentry>
</variablelist>
</refsect1>
<varlistentry>
<term><varname>UseRoutes=</varname></term>
<listitem>
- <para>When true (the default), the static routes will be
- requested from the DHCP server and added to the routing
- table with a metric of 1024.</para>
+ <para>When true (the default), the static routes will be requested from the DHCP server and added to the
+ routing table with a metric of 1024, and a scope of "global", "link" or "host", depending on the route's
+ destination and gateway. If the destination is on the local host, e.g., 127.x.x.x, or the same as the
+ link's own address, the scope will be set to "host". Otherwise if the gateway is null (a direct route), a
+ "link" scope will be used. For anything else, scope defaults to "global".</para>
</listitem>
</varlistentry>
<para>Sets the "cost" of sending packets of this interface.
Each port in a bridge may have a different speed and the cost
is used to decide which link to use. Faster interfaces
- should have lower costs.</para>
+ should have lower costs. It is an integer value between 1 and
+ 65535.</para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><varname>Priority=</varname></term>
+ <listitem>
+ <para>Sets the "priority" of sending packets on this interface.
+ Each port in a bridge may have a different priority which is used
+ to decide which link to use. Lower value means higher priority.
+ It is an integer value between 0 to 63. Networkd does not set any
+ default, meaning the kernel default value of 32 is used.</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1>
- <title>Example</title>
+ <title>Examples</title>
<example>
- <title>/etc/systemd/network/50-static.network</title>
+ <title>Static network configuration</title>
- <programlisting>[Match]
+ <programlisting># /etc/systemd/network/50-static.network
+[Match]
Name=enp2s0
[Network]
Address=192.168.0.15/24
Gateway=192.168.0.1</programlisting>
+
+ <para>This brings interface <literal>enp2s0</literal> up with a static address. The
+ specified gateway will be used for a default route.</para>
</example>
<example>
- <title>/etc/systemd/network/80-dhcp.network</title>
+ <title>DHCP on ethernet links</title>
- <programlisting>[Match]
+ <programlisting># /etc/systemd/network/80-dhcp.network
+[Match]
Name=en*
[Network]
DHCP=yes</programlisting>
+
+ <para>This will enable DHCPv4 and DHCPv6 on all interfaces with names starting with
+ <literal>en</literal> (i.e. ethernet interfaces).</para>
</example>
<example>
- <title>/etc/systemd/network/25-bridge-static.network</title>
+ <title>A bridge with two enslaved links</title>
- <programlisting>[Match]
+ <programlisting># /etc/systemd/network/25-bridge-static.network
+[Match]
Name=bridge0
[Network]
Address=192.168.0.15/24
Gateway=192.168.0.1
DNS=192.168.0.1</programlisting>
- </example>
- <example>
- <title>/etc/systemd/network/25-bridge-slave-interface.network</title>
-
- <programlisting>[Match]
+ <programlisting># /etc/systemd/network/25-bridge-slave-interface-1.network
+[Match]
Name=enp2s0
[Network]
Bridge=bridge0</programlisting>
+
+ <programlisting># /etc/systemd/network/25-bridge-slave-interface-2.network
+[Match]
+Name=wlp3s0
+
+[Network]
+Bridge=bridge0</programlisting>
+
+ <para>This creates a bridge and attaches devices <literal>enp2s0</literal> and
+ <literal>wlp3s0</literal> to it. The bridge will have the specified static address
+ and network assigned, and a default route via the specified gateway will be
+ added. The specified DNS server will be added to the global list of DNS resolvers.
+ </para>
</example>
+
<example>
- <title>/etc/systemd/network/25-bridge-slave-interface-vlan.network</title>
+ <title></title>
- <programlisting>[Match]
+ <programlisting>
+# /etc/systemd/network/20-bridge-slave-interface-vlan.network
+[Match]
Name=enp2s0
[Network]
[BridgeVLAN]
EgressUntagged=300-400</programlisting>
+
+ <para>This overrides the configuration specified in the previous example for the
+ interface <literal>enp2s0</literal>, and enables VLAN on that bridge port. VLAN IDs
+ 1-32, 42, 100-400 will be allowed. Packets tagged with VLAN IDs 42, 300-400 will be
+ untagged when they leave on this interface. Untagged packets which arrive on this
+ interface will be assigned VLAN ID 42.</para>
</example>
+
<example>
- <title>/etc/systemd/network/25-ipip.network</title>
+ <title>Various tunnels</title>
- <programlisting>[Match]
-Name=em1
+ <programlisting>/etc/systemd/network/25-tunnels.network
+[Match]
+Name=ens1
[Network]
-Tunnel=ipip-tun</programlisting>
+Tunnel=ipip-tun
+Tunnel=sit-tun
+Tunnel=gre-tun
+Tunnel=vti-tun
+ </programlisting>
+
+ <programlisting>/etc/systemd/network/25-tunnel-ipip.netdev
+[NetDev]
+Name=ipip-tun
+Kind=ipip
+ </programlisting>
+
+ <programlisting>/etc/systemd/network/25-tunnel-sit.netdev
+[NetDev]
+Name=sit-tun
+Kind=sit
+ </programlisting>
+
+ <programlisting>/etc/systemd/network/25-tunnel-gre.netdev
+[NetDev]
+Name=gre-tun
+Kind=gre
+ </programlisting>
+
+ <programlisting>/etc/systemd/network/25-tunnel-vti.netdev
+[NetDev]
+Name=vti-tun
+Kind=vti
+ </programlisting>
+
+ <para>This will bring interface <literal>ens1</literal> up and create an IPIP tunnel,
+ a SIT tunnel, a GRE tunnel, and a VTI tunnel using it.</para>
</example>
<example>
- <title>/etc/systemd/network/25-sit.network</title>
+ <title>A bond device</title>
- <programlisting>[Match]
-Name=em1
+ <programlisting># /etc/systemd/network/30-bond1.network
+[Match]
+Name=bond1
[Network]
-Tunnel=sit-tun</programlisting>
- </example>
+DHCP=ipv6
+</programlisting>
- <example>
- <title>/etc/systemd/network/25-gre.network</title>
+ <programlisting># /etc/systemd/network/30-bond1.netdev
+[NetDev]
+Name=bond1
+Kind=bond
+</programlisting>
- <programlisting>[Match]
-Name=em1
+ <programlisting># /etc/systemd/network/30-bond1-dev1.network
+[Match]
+MACAddress=52:54:00:e9:64:41
[Network]
-Tunnel=gre-tun</programlisting>
- </example>
-
- <example>
- <title>/etc/systemd/network/25-vti.network</title>
+Bond=bond1
+</programlisting>
- <programlisting>[Match]
-Name=em1
+ <programlisting># /etc/systemd/network/30-bond1-dev2.network
+[Match]
+MACAddress=52:54:00:e9:64:42
[Network]
-Tunnel=vti-tun</programlisting>
+Bond=bond1
+</programlisting>
+
+ <para>This will create a bond device <literal>bond1</literal> and enslave the two
+ devices with MAC addresses 52:54:00:e9:64:41 and 52:54:00:e9:64:42 to it. IPv6 DHCP
+ will be used to acquire an address.</para>
</example>
<example>
- <title>/etc/systemd/network/25-bond.network</title>
-
- <programlisting>[Match]
+ <title>Virtual Routing and Forwarding (VRF)</title>
+ <para>Add the <literal>bond1</literal> interface to the VRF master interface
+ <literal>vrf1</literal>. This will redirect routes generated on this interface to be
+ within the routing table defined during VRF creation. Traffic won't be redirected
+ towards the VRFs routing table unless specific ip-rules are added.</para>
+ <programlisting># /etc/systemd/network/25-vrf.network
+[Match]
Name=bond1
[Network]
-DHCP=yes
+VRF=vrf1
</programlisting>
</example>
<example>
- <title>/etc/systemd/network/25-vrf.network</title>
- <para>Add the bond1 interface to the VRF master interface vrf-test. This will redirect routes generated on this interface to be within the routing table defined during VRF creation. Traffic won't be redirected towards the VRFs routing table unless specific ip-rules are added.</para>
- <programlisting>[Match]
-Name=bond1
+ <title>MacVTap</title>
+ <para>This brings up a network interface <literal>macvtap-test</literal>
+ and attaches it to <literal>enp0s25</literal>.</para>
+ <programlisting># /usr/lib/systemd/network/25-macvtap.network
+[Match]
+Name=enp0s25
[Network]
-VRF=vrf-test
+MACVTAP=macvtap-test
</programlisting>
</example>
-
</refsect1>
<refsect1>