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987 lines
35 KiB
XML
987 lines
35 KiB
XML
<?xml version='1.0'?> <!--*-nxml-*-->
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<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
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"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
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<!--
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This file is part of systemd.
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Copyright 2013 Tom Gundersen
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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-->
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<refentry id="systemd.netdev" conditional='ENABLE_NETWORKD'>
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<refentryinfo>
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<title>systemd.network</title>
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<productname>systemd</productname>
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<authorgroup>
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<author>
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<contrib>Developer</contrib>
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<firstname>Tom</firstname>
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<surname>Gundersen</surname>
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<email>teg@jklm.no</email>
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</author>
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</authorgroup>
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</refentryinfo>
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<refmeta>
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<refentrytitle>systemd.netdev</refentrytitle>
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<manvolnum>5</manvolnum>
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</refmeta>
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<refnamediv>
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<refname>systemd.netdev</refname>
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<refpurpose>Virtual Network Device configuration</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<para><filename><replaceable>netdev</replaceable>.netdev</filename></para>
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</refsynopsisdiv>
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<refsect1>
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<title>Description</title>
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<para>Network setup is performed by
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<citerefentry><refentrytitle>systemd-networkd</refentrytitle><manvolnum>8</manvolnum></citerefentry>.
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</para>
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<para>Virtual Network Device files must have the extension
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<filename>.netdev</filename>; other extensions are ignored.
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Virtual network devices are created as soon as networkd is
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started. If a netdev with the specified name already exists,
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networkd will use that as-is rather than create its own. Note that
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the settings of the pre-existing netdev will not be changed by
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networkd.</para>
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<para>The <filename>.netdev</filename> files are read from the
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files located in the system network directory
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<filename>/usr/lib/systemd/network</filename>, the volatile
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runtime network directory
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<filename>/run/systemd/network</filename> and the local
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administration network directory
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<filename>/etc/systemd/network</filename>. All configuration files
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are collectively sorted and processed in lexical order, regardless
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of the directories in which they live. However, files with
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identical filenames replace each other. Files in
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<filename>/etc</filename> have the highest priority, files in
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<filename>/run</filename> take precedence over files with the same
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name in <filename>/usr/lib</filename>. This can be used to
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override a system-supplied configuration file with a local file if
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needed. As a special case, an empty file (file size 0) or symlink
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with the same name pointing to <filename>/dev/null</filename>,
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disable the configuration file entirely (it is "masked").</para>
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</refsect1>
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<refsect1>
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<title>Supported netdev kinds</title>
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<para>The following kinds of virtual network devices may be
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configured in <filename>.netdev</filename> files:</para>
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<table>
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<title>Supported kinds of virtual network devices</title>
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<tgroup cols='2'>
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<colspec colname='kind' />
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<colspec colname='explanation' />
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<thead><row>
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<entry>Kind</entry>
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<entry>Description</entry>
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</row></thead>
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<tbody>
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<row><entry><varname>bond</varname></entry>
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<entry>A bond device is an aggregation of all its slave devices. See <ulink url="https://www.kernel.org/doc/Documentation/networking/bonding.txt">Linux Ethernet Bonding Driver HOWTO</ulink> for details.Local configuration</entry></row>
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<row><entry><varname>bridge</varname></entry>
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<entry>A bridge device is a software switch, each of its slave devices and the bridge itself are ports of the switch.</entry></row>
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<row><entry><varname>dummy</varname></entry>
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<entry>A dummy device drops all packets sent to it.</entry></row>
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<row><entry><varname>gre</varname></entry>
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<entry>A Level 3 GRE tunnel over IPv4. See <ulink url="https://tools.ietf.org/html/rfc2784">RFC 2784</ulink> for details.</entry></row>
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<row><entry><varname>gretap</varname></entry>
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<entry>A Level 2 GRE tunnel over IPv4.</entry></row>
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<row><entry><varname>ip6gre</varname></entry>
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<entry>A Level 3 GRE tunnel over IPv6.</entry></row>
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<row><entry><varname>ip6tnl</varname></entry>
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<entry>An IPv4 or IPv6 tunnel over IPv6</entry></row>
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<row><entry><varname>ip6gretap</varname></entry>
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<entry>An Level 2 GRE tunnel over IPv6.</entry></row>
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<row><entry><varname>ipip</varname></entry>
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<entry>An IPv4 over IPv4 tunnel.</entry></row>
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<row><entry><varname>ipvlan</varname></entry>
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<entry>An ipvlan device is a stacked device which receives packets from its underlying device based on IP address filtering.</entry></row>
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<row><entry><varname>macvlan</varname></entry>
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<entry>A macvlan device is a stacked device which receives packets from its underlying device based on MAC address filtering.</entry></row>
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<row><entry><varname>sit</varname></entry>
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<entry>An IPv6 over IPv4 tunnel.</entry></row>
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<row><entry><varname>tap</varname></entry>
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<entry>A persistent Level 2 tunnel between a network device and a device node.</entry></row>
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<row><entry><varname>tun</varname></entry>
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<entry>A persistent Level 3 tunnel between a network device and a device node.</entry></row>
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<row><entry><varname>veth</varname></entry>
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<entry>An ethernet tunnel between a pair of network devices.</entry></row>
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<row><entry><varname>vlan</varname></entry>
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<entry>A VLAN is a stacked device which receives packets from its underlying device based on VLAN tagging. See <ulink url="http://www.ieee802.org/1/pages/802.1Q.html">IEEE 802.1Q</ulink> for details.</entry></row>
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<row><entry><varname>vti</varname></entry>
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<entry>An IPv4 over IPSec tunnel.</entry></row>
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<row><entry><varname>vti6</varname></entry>
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<entry>An IPv6 over IPSec tunnel.</entry></row>
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<row><entry><varname>vxlan</varname></entry>
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<entry>A virtual extensible LAN (vxlan), for connecting Cloud computing deployments.</entry></row>
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</tbody>
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</tgroup>
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</table>
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</refsect1>
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<refsect1>
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<title>[Match] Section Options</title>
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<para>A virtual network device is only created if the
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<literal>[Match]</literal> section matches the current
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environment, or if the section is empty. The following keys are
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accepted:</para>
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<variablelist class='network-directives'>
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<varlistentry>
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<term><varname>Host=</varname></term>
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<listitem>
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<para>Matches against the hostname or machine ID of the
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host. See <literal>ConditionHost=</literal> in
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<citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>
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for details.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>Virtualization=</varname></term>
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<listitem>
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<para>Checks whether the system is executed in a virtualized
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environment and optionally test whether it is a specific
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implementation. See
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<literal>ConditionVirtualization=</literal> in
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<citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>
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for details.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>KernelCommandLine=</varname></term>
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<listitem>
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<para>Checks whether a specific kernel command line option
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is set (or if prefixed with the exclamation mark unset). See
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<literal>ConditionKernelCommandLine=</literal> in
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<citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>
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for details.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>Architecture=</varname></term>
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<listitem>
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<para>Checks whether the system is running on a specific
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architecture. See <literal>ConditionArchitecture=</literal> in
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<citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>
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for details.
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</refsect1>
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<refsect1>
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<title>[NetDev] Section Options</title>
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<para>The <literal>[NetDev]</literal> section accepts the
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following keys:</para>
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<variablelist class='network-directives'>
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<varlistentry>
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<term><varname>Description=</varname></term>
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<listitem>
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<para>A free-form description of the netdev.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>Name=</varname></term>
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<listitem>
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<para>The interface name used when creating the netdev.
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This option is compulsory.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>Kind=</varname></term>
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<listitem>
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<para>The netdev kind. This option is compulsory. See the
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<literal>Supported netdev kinds</literal> section for the
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valid keys.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>MTUBytes=</varname></term>
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<listitem>
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<para>The maximum transmission unit in bytes to set for
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the device. The usual suffixes K, M, G, are supported and
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are understood to the base of 1024. This key is not
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currently supported for <literal>tun</literal> or
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<literal>tap</literal> devices.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>MACAddress=</varname></term>
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<listitem>
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<para>The MAC address to use for the device. If none is
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given, one is generated based on the interface name and
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the
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<citerefentry><refentrytitle>machine-id</refentrytitle><manvolnum>5</manvolnum></citerefentry>.
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This key is not currently supported for
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<literal>tun</literal> or <literal>tap</literal> devices.
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</refsect1>
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<refsect1>
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<title>[VLAN] Section Options</title>
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<para>The <literal>[VLAN]</literal> section only applies for
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netdevs of kind <literal>vlan</literal>, and accepts the
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following key:</para>
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<variablelist class='network-directives'>
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<varlistentry>
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<term><varname>Id=</varname></term>
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<listitem>
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<para>The VLAN ID to use. An integer in the range 0–4094.
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This option is compulsory.</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</refsect1>
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<refsect1>
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<title>[MACVLAN] Section Options</title>
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<para>The <literal>[MACVLAN]</literal> section only applies for
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netdevs of kind <literal>macvlan</literal>, and accepts the
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following key:</para>
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<variablelist class='network-directives'>
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<varlistentry>
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<term><varname>Mode=</varname></term>
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<listitem>
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<para>The MACVLAN mode to use. The supported options are
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<literal>private</literal>,
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<literal>vepa</literal>,
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<literal>bridge</literal>, and
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<literal>passthru</literal>.
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</refsect1>
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<refsect1>
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<title>[IPVLAN] Section Options</title>
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<para>The <literal>[IPVLAN]</literal> section only applies for
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netdevs of kind <literal>ipvlan</literal>, and accepts the
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following key:</para>
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<variablelist class='network-directives'>
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<varlistentry>
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<term><varname>Mode=</varname></term>
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<listitem>
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<para>The IPVLAN mode to use. The supported options are
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<literal>L2</literal> and <literal>L3</literal>.
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</refsect1>
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<refsect1>
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<title>[VXLAN] Section Options</title>
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<para>The <literal>[VXLAN]</literal> section only applies for
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netdevs of kind <literal>vxlan</literal>, and accepts the
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following keys:</para>
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<variablelist class='network-directives'>
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<varlistentry>
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<term><varname>Id=</varname></term>
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<listitem>
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<para>The VXLAN ID to use.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>Group=</varname></term>
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<listitem>
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<para>An assigned multicast group IP address.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>TOS=</varname></term>
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<listitem>
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<para>The Type Of Service byte value for a vxlan interface.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>TTL=</varname></term>
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<listitem>
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<para>A fixed Time To Live N on Virtual eXtensible Local
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Area Network packets. N is a number in the range 1-255. 0
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is a special value meaning that packets inherit the TTL
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value.</para>
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</listitem>
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||
</varlistentry>
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<varlistentry>
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<term><varname>MacLearning=</varname></term>
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<listitem>
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<para>A boolean. When true, enables dynamic MAC learning
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to discover remote MAC addresses.</para>
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</listitem>
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||
</varlistentry>
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<varlistentry>
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||
<term><varname>FDBAgeingSec=</varname></term>
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||
<listitem>
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<para>The lifetime of Forwarding Database entry learnt by
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the kernel in seconds.</para>
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||
</listitem>
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||
</varlistentry>
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||
<varlistentry>
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||
<term><varname>ARPProxy=</varname></term>
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||
<listitem>
|
||
<para>A boolean. When true, enables ARP proxy.</para>
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</listitem>
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||
</varlistentry>
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||
<varlistentry>
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<term><varname>L2MissNotification=</varname></term>
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||
<listitem>
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||
<para>A boolean. When true, enables netlink LLADDR miss
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||
notifications.</para>
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||
</listitem>
|
||
</varlistentry>
|
||
<varlistentry>
|
||
<term><varname>L3MissNotification=</varname></term>
|
||
<listitem>
|
||
<para>A boolean. When true, enables netlink IP ADDR miss
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||
notifications.</para>
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||
</listitem>
|
||
</varlistentry>
|
||
<varlistentry>
|
||
<term><varname>RouteShortCircuit=</varname></term>
|
||
<listitem>
|
||
<para>A boolean. When true route short circuit is turned
|
||
on.</para>
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||
</listitem>
|
||
</varlistentry>
|
||
<varlistentry>
|
||
<term><varname>UDPCheckSum=</varname></term>
|
||
<listitem>
|
||
<para>A boolean. When true transmitting UDP checksums when doing VXLAN/IPv4 is turned on.</para>
|
||
</listitem>
|
||
</varlistentry>
|
||
<varlistentry>
|
||
<term><varname>UDP6ZeroChecksumTx=</varname></term>
|
||
<listitem>
|
||
<para>A boolean. When true sending zero checksums in VXLAN/IPv6 is turned on.</para>
|
||
</listitem>
|
||
</varlistentry>
|
||
<varlistentry>
|
||
<term><varname>UDP6ZeroCheckSumRx=</varname></term>
|
||
<listitem>
|
||
<para>A boolean. When true receiving zero checksums in VXLAN/IPv6 is turned on.</para>
|
||
</listitem>
|
||
</varlistentry>
|
||
</variablelist>
|
||
</refsect1>
|
||
<refsect1>
|
||
<title>[Tunnel] Section Options</title>
|
||
|
||
<para>The <literal>[Tunnel]</literal> section only applies for
|
||
netdevs of kind
|
||
<literal>ipip</literal>,
|
||
<literal>sit</literal>,
|
||
<literal>gre</literal>,
|
||
<literal>gretap</literal>,
|
||
<literal>ip6gre</literal>,
|
||
<literal>ip6gretap</literal>,
|
||
<literal>vti</literal>,
|
||
<literal>vti6</literal>, and
|
||
<literal>ip6tnl</literal> and accepts
|
||
the following keys:</para>
|
||
|
||
<variablelist class='network-directives'>
|
||
<varlistentry>
|
||
<term><varname>Local=</varname></term>
|
||
<listitem>
|
||
<para>A static local address for tunneled packets. It must
|
||
be an address on another interface of this host.</para>
|
||
</listitem>
|
||
</varlistentry>
|
||
<varlistentry>
|
||
<term><varname>Remote=</varname></term>
|
||
<listitem>
|
||
<para>The remote endpoint of the tunnel.</para>
|
||
</listitem>
|
||
</varlistentry>
|
||
<varlistentry>
|
||
<term><varname>TOS=</varname></term>
|
||
<listitem>
|
||
<para>The Type Of Service byte value for a tunnel interface.
|
||
For details about the TOS see the
|
||
<ulink url="http://tools.ietf.org/html/rfc1349"> Type of
|
||
Service in the Internet Protocol Suite </ulink> document.
|
||
</para>
|
||
</listitem>
|
||
</varlistentry>
|
||
<varlistentry>
|
||
<term><varname>TTL=</varname></term>
|
||
<listitem>
|
||
<para>A fixed Time To Live N on tunneled packets. N is a
|
||
number in the range 1-255. 0 is a special value meaning that
|
||
packets inherit the TTL value. The default value for IPv4
|
||
tunnels is: inherit. The default value for IPv6 tunnels is:
|
||
64.</para>
|
||
</listitem>
|
||
</varlistentry>
|
||
<varlistentry>
|
||
<term><varname>DiscoverPathMTU=</varname></term>
|
||
<listitem>
|
||
<para>A boolean. When true, enables Path MTU Discovery on
|
||
the tunnel.</para>
|
||
</listitem>
|
||
</varlistentry>
|
||
<varlistentry>
|
||
<term><varname>IPv6FlowLabel=</varname></term>
|
||
<listitem>
|
||
<para>Configures The 20-bit Flow Label (see <ulink url="https://tools.ietf.org/html/rfc6437">
|
||
RFC 6437</ulink>) field in the IPv6 header (see <ulink url="https://tools.ietf.org/html/rfc2460">
|
||
RFC 2460</ulink>), is used by a node to label packets of a flow.
|
||
It's only used for IPv6 Tunnels.
|
||
A Flow Label of zero is used to indicate packets that have
|
||
not been labeled. Takes following values.
|
||
When <literal>inherit</literal> it uses the original flowlabel,
|
||
or can be configured to any value between 0 to 0xFFFFF.</para>
|
||
</listitem>
|
||
</varlistentry>
|
||
<varlistentry>
|
||
<term><varname>CopyDSCP=</varname></term>
|
||
<listitem>
|
||
<para>A boolean. When true, the Differentiated Service Code
|
||
Point (DSCP) field will be copied to the inner header from
|
||
outer header during the decapsulation of an IPv6 tunnel
|
||
packet. DSCP is a field in an IP packet that enables different
|
||
levels of service to be assigned to network traffic.
|
||
Defaults to <literal>no</literal>.
|
||
</para>
|
||
</listitem>
|
||
</varlistentry>
|
||
<varlistentry>
|
||
<term><varname>Mode=</varname></term>
|
||
<listitem>
|
||
<para>An <literal>ip6tnl</literal> tunnels can have three
|
||
modes
|
||
<literal>ip6ip6</literal> for IPv6 over IPv6,
|
||
<literal>ipip6</literal> for IPv4 over IPv6 or
|
||
<literal>any</literal> for either.
|
||
</para>
|
||
</listitem>
|
||
</varlistentry>
|
||
</variablelist>
|
||
</refsect1>
|
||
<refsect1>
|
||
<title>[Peer] Section Options</title>
|
||
|
||
<para>The <literal>[Peer]</literal> section only applies for
|
||
netdevs of kind <literal>veth</literal> and accepts the
|
||
following key:</para>
|
||
|
||
<variablelist class='network-directives'>
|
||
<varlistentry>
|
||
<term><varname>Name=</varname></term>
|
||
<listitem>
|
||
<para>The interface name used when creating the netdev.
|
||
This option is compulsory.</para>
|
||
</listitem>
|
||
</varlistentry>
|
||
<varlistentry>
|
||
<term><varname>MACAddress=</varname></term>
|
||
<listitem>
|
||
<para>The peer MACAddress, if not set it is generated in
|
||
the same way as the MAC address of the main
|
||
interface.</para>
|
||
</listitem>
|
||
</varlistentry>
|
||
</variablelist>
|
||
</refsect1>
|
||
<refsect1>
|
||
<title>[Tun] Section Options</title>
|
||
|
||
<para>The <literal>[Tun]</literal> section only applies for
|
||
netdevs of kind <literal>tun</literal>, and accepts the following
|
||
keys:</para>
|
||
|
||
<variablelist class='network-directives'>
|
||
<varlistentry>
|
||
<term><varname>OneQueue=</varname></term>
|
||
<listitem><para>Takes a boolean argument. Configures whether
|
||
all packets are queued at the device (enabled), or a fixed
|
||
number of packets are queued at the device and the rest at the
|
||
<literal>qdisc</literal>. Defaults to
|
||
<literal>no</literal>.</para>
|
||
</listitem>
|
||
</varlistentry>
|
||
<varlistentry>
|
||
<term><varname>MultiQueue=</varname></term>
|
||
<listitem><para>Takes a boolean argument. Configures whether
|
||
to use multiple file descriptors (queues) to parallelize
|
||
packets sending and receiving. Defaults to
|
||
<literal>no</literal>.</para>
|
||
</listitem>
|
||
</varlistentry>
|
||
<varlistentry>
|
||
<term><varname>PacketInfo=</varname></term>
|
||
<listitem><para>Takes a boolean argument. Configures whether
|
||
packets should be prepended with four extra bytes (two flag
|
||
bytes and two protocol bytes). If disabled it indicates that
|
||
the packets will be pure IP packets. Defaults to
|
||
<literal>no</literal>.</para>
|
||
</listitem>
|
||
</varlistentry>
|
||
<varlistentry>
|
||
<term><varname>VnetHeader=</varname></term>
|
||
<listitem><para>Takes a boolean argument. Configures
|
||
IFF_VNET_HDR flag for a tap device. It allows sending
|
||
and receiving larger Generic Segmentation Offload (GSO)
|
||
packets. This may increase throughput significantly.
|
||
Defaults to
|
||
<literal>no</literal>.</para>
|
||
</listitem>
|
||
</varlistentry>
|
||
<varlistentry>
|
||
<term><varname>User=</varname></term>
|
||
<listitem><para>User to grant access to the
|
||
<filename>/dev/net/tun</filename> device.</para>
|
||
</listitem>
|
||
</varlistentry>
|
||
<varlistentry>
|
||
<term><varname>Group=</varname></term>
|
||
<listitem><para>Group to grant access to the
|
||
<filename>/dev/net/tun</filename> device.</para>
|
||
</listitem>
|
||
</varlistentry>
|
||
|
||
</variablelist>
|
||
|
||
</refsect1>
|
||
|
||
<refsect1>
|
||
<title>[Tap] Section Options</title>
|
||
|
||
<para>The <literal>[Tap]</literal> section only applies for
|
||
netdevs of kind <literal>tap</literal>, and accepts the same keys
|
||
as the <literal>[Tun]</literal> section.</para>
|
||
</refsect1>
|
||
|
||
<refsect1>
|
||
<title>[Bond] Section Options</title>
|
||
|
||
<para>The <literal>[Bond]</literal> section accepts the following
|
||
key:</para>
|
||
|
||
<variablelist class='network-directives'>
|
||
<varlistentry>
|
||
<term><varname>Mode=</varname></term>
|
||
<listitem>
|
||
<para>Specifies one of the bonding policies. The default is
|
||
<literal>balance-rr</literal> (round robin). Possible values are
|
||
<literal>balance-rr</literal>,
|
||
<literal>active-backup</literal>,
|
||
<literal>balance-xor</literal>,
|
||
<literal>broadcast</literal>,
|
||
<literal>802.3ad</literal>,
|
||
<literal>balance-tlb</literal>, and
|
||
<literal>balance-alb</literal>.
|
||
</para>
|
||
</listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term><varname>TransmitHashPolicy=</varname></term>
|
||
<listitem>
|
||
<para>Selects the transmit hash policy to use for slave
|
||
selection in balance-xor, 802.3ad, and tlb modes. Possible
|
||
values are
|
||
<literal>layer2</literal>,
|
||
<literal>layer3+4</literal>,
|
||
<literal>layer2+3</literal>,
|
||
<literal>encap2+3</literal>,
|
||
<literal>802.3ad</literal>, and
|
||
<literal>encap3+4</literal>.
|
||
</para>
|
||
</listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term><varname>LACPTransmitRate=</varname></term>
|
||
<listitem>
|
||
<para>Specifies the rate with which link partner transmits
|
||
Link Aggregation Control Protocol Data Unit packets in
|
||
802.3ad mode. Possible values are <literal>slow</literal>,
|
||
which requests partner to transmit LACPDUs every 30 seconds,
|
||
and <literal>fast</literal>, which requests partner to
|
||
transmit LACPDUs every second. The default value is
|
||
<literal>slow</literal>.</para>
|
||
</listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term><varname>MIIMonitorSec=</varname></term>
|
||
<listitem>
|
||
<para>Specifies the frequency that Media Independent
|
||
Interface link monitoring will occur. A value of zero
|
||
disables MII link monitoring. This value is rounded down to
|
||
the nearest millisecond. The default value is 0.</para>
|
||
</listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term><varname>UpDelaySec=</varname></term>
|
||
<listitem>
|
||
<para>Specifies the delay before a link is enabled after a
|
||
link up status has been detected. This value is rounded down
|
||
to a multiple of MIIMonitorSec. The default value is
|
||
0.</para>
|
||
</listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term><varname>DownDelaySec=</varname></term>
|
||
<listitem>
|
||
<para>Specifies the delay before a link is disabled after a
|
||
link down status has been detected. This value is rounded
|
||
down to a multiple of MIIMonitorSec. The default value is
|
||
0.</para>
|
||
</listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term><varname>LearnPacketIntervalSec=</varname></term>
|
||
<listitem>
|
||
<para>Specifies the number of seconds between instances where the bonding
|
||
driver sends learning packets to each slaves peer switch.
|
||
The valid range is 1 - 0x7fffffff; the default value is 1. This Option
|
||
has effect only in balance-tlb and balance-alb modes.</para>
|
||
</listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term><varname>AdSelect=</varname></term>
|
||
<listitem>
|
||
<para>Specifies the 802.3ad aggregation selection logic to use. Possible values are
|
||
<literal>stable</literal>,
|
||
<literal>bandwidth</literal>,
|
||
<literal>count</literal>
|
||
</para>
|
||
</listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term><varname>FailOverMACPolicy=</varname></term>
|
||
<listitem>
|
||
<para>Specifies whether active-backup mode should set all slaves to
|
||
the same MAC address at enslavement or, when enabled, perform special handling of the
|
||
bond's MAC address in accordance with the selected policy. The default policy is none.
|
||
Possible values are
|
||
<literal>none</literal>,
|
||
<literal>active</literal>,
|
||
<literal>follow</literal>
|
||
</para>
|
||
</listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term><varname>ARPValidate=</varname></term>
|
||
<listitem>
|
||
<para>Specifies whether or not ARP probes and replies should be
|
||
validated in any mode that supports ARP monitoring, or whether
|
||
non-ARP traffic should be filtered (disregarded) for link
|
||
monitoring purposes. Possible values are
|
||
<literal>none</literal>,
|
||
<literal>active</literal>,
|
||
<literal>backup</literal>,
|
||
<literal>all</literal>
|
||
</para>
|
||
</listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term><varname>ARPIntervalSec=</varname></term>
|
||
<listitem>
|
||
<para>Specifies the ARP link monitoring frequency in milliseconds.
|
||
A value of 0 disables ARP monitoring. The default value is 0.
|
||
</para>
|
||
</listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term><varname>ARPIPTargets=</varname></term>
|
||
<listitem>
|
||
<para>Specifies the IP addresses to use as ARP monitoring peers when
|
||
ARPIntervalSec is greater than 0. These are the targets of the ARP request
|
||
sent to determine the health of the link to the targets.
|
||
Specify these values in ipv4 dotted decimal format. At least one IP
|
||
address must be given for ARP monitoring to function. The
|
||
maximum number of targets that can be specified is 16. The
|
||
default value is no IP addresses.
|
||
</para>
|
||
</listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term><varname>ARPAllTargets=</varname></term>
|
||
<listitem>
|
||
<para>Specifies the quantity of ARPIPTargets that must be reachable
|
||
in order for the ARP monitor to consider a slave as being up.
|
||
This option affects only active-backup mode for slaves with
|
||
ARPValidate enabled. Possible values are
|
||
<literal>any</literal>,
|
||
<literal>all</literal>
|
||
</para>
|
||
</listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term><varname>PrimaryReselectPolicy=</varname></term>
|
||
<listitem>
|
||
<para>Specifies the reselection policy for the primary slave. This
|
||
affects how the primary slave is chosen to become the active slave
|
||
when failure of the active slave or recovery of the primary slave
|
||
occurs. This option is designed to prevent flip-flopping between
|
||
the primary slave and other slaves. Possible values are
|
||
<literal>always</literal>,
|
||
<literal>better</literal>,
|
||
<literal>failure</literal>
|
||
</para>
|
||
</listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term><varname>ResendIGMP=</varname></term>
|
||
<listitem>
|
||
<para>Specifies the number of IGMP membership reports to be issued after
|
||
a failover event. One membership report is issued immediately after
|
||
the failover, subsequent packets are sent in each 200ms interval.
|
||
The valid range is (0 - 255). Defaults to 1. A value of 0
|
||
prevents the IGMP membership report from being issued in response
|
||
to the failover event.
|
||
</para>
|
||
</listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term><varname>PacketsPerSlave=</varname></term>
|
||
<listitem>
|
||
<para> Specify the number of packets to transmit through a slave before
|
||
moving to the next one. When set to 0 then a slave is chosen at
|
||
random. The valid range is (0 - 65535). Defaults to 1. This option
|
||
has effect only in balance-rr mode.
|
||
</para>
|
||
</listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term><varname>GratuitousARP=</varname></term>
|
||
<listitem>
|
||
<para>Specify the number of peer notifications (gratuitous ARPs and
|
||
unsolicited IPv6 Neighbor Advertisements) to be issued after a
|
||
failover event. As soon as the link is up on the new slave
|
||
a peer notification is sent on the bonding device and each
|
||
VLAN sub-device. This is repeated at each link monitor interval
|
||
(ARPIntervalSec or MIIMonitorSec, whichever is active) if the number is
|
||
greater than 1. The valid range is (0 - 255). Default value is 1.
|
||
These options affect only the active-backup mode.
|
||
</para>
|
||
</listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term><varname>AllSlavesActive=</varname></term>
|
||
<listitem>
|
||
<para> A boolean. Specifies that duplicate frames (received on inactive ports)
|
||
should be dropped false or delivered true. Normally, bonding will drop
|
||
duplicate frames (received on inactive ports), which is desirable for
|
||
most users. But there are some times it is nice to allow duplicate
|
||
frames to be delivered. The default value is false (drop duplicate frames
|
||
received on inactive ports).
|
||
</para>
|
||
</listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term><varname>MinLinks=</varname></term>
|
||
<listitem>
|
||
<para>Specifies the minimum number of links that must be active before
|
||
asserting carrier. The default value is 0.
|
||
</para>
|
||
</listitem>
|
||
</varlistentry>
|
||
|
||
</variablelist>
|
||
|
||
<para>For more detail information see
|
||
<ulink url="https://www.kernel.org/doc/Documentation/networking/bonding.txt">
|
||
Linux Ethernet Bonding Driver HOWTO</ulink></para>
|
||
|
||
</refsect1>
|
||
|
||
<refsect1>
|
||
<title>Example</title>
|
||
<example>
|
||
<title>/etc/systemd/network/bridge.netdev</title>
|
||
|
||
<programlisting>[NetDev]
|
||
Name=bridge0
|
||
Kind=bridge</programlisting>
|
||
</example>
|
||
|
||
<example>
|
||
<title>/etc/systemd/network/vlan1.netdev</title>
|
||
|
||
<programlisting>[Match]
|
||
Virtualization=no
|
||
|
||
[NetDev]
|
||
Name=vlan1
|
||
Kind=vlan
|
||
|
||
[VLAN]
|
||
Id=1</programlisting>
|
||
</example>
|
||
<example>
|
||
<title>/etc/systemd/network/ipip.netdev</title>
|
||
<programlisting>[NetDev]
|
||
Name=ipip-tun
|
||
Kind=ipip
|
||
MTUBytes=1480
|
||
|
||
[Tunnel]
|
||
Local=192.168.223.238
|
||
Remote=192.169.224.239
|
||
TTL=64</programlisting>
|
||
</example>
|
||
<example>
|
||
<title>/etc/systemd/network/tap.netdev</title>
|
||
<programlisting>[NetDev]
|
||
Name=tap-test
|
||
Kind=tap
|
||
|
||
[Tap]
|
||
MultiQueue=true
|
||
PacketInfo=true</programlisting> </example>
|
||
|
||
<example>
|
||
<title>/etc/systemd/network/sit.netdev</title>
|
||
<programlisting>[NetDev]
|
||
Name=sit-tun
|
||
Kind=sit
|
||
MTUBytes=1480
|
||
|
||
[Tunnel]
|
||
Local=10.65.223.238
|
||
Remote=10.65.223.239</programlisting>
|
||
</example>
|
||
|
||
<example>
|
||
<title>/etc/systemd/network/gre.netdev</title>
|
||
<programlisting>[NetDev]
|
||
Name=gre-tun
|
||
Kind=gre
|
||
MTUBytes=1480
|
||
|
||
[Tunnel]
|
||
Local=10.65.223.238
|
||
Remote=10.65.223.239</programlisting>
|
||
</example>
|
||
|
||
<example>
|
||
<title>/etc/systemd/network/vti.netdev</title>
|
||
|
||
<programlisting>[NetDev]
|
||
Name=vti-tun
|
||
Kind=vti
|
||
MTUBytes=1480
|
||
|
||
[Tunnel]
|
||
Local=10.65.223.238
|
||
Remote=10.65.223.239</programlisting>
|
||
</example>
|
||
|
||
<example>
|
||
<title>/etc/systemd/network/veth.netdev</title>
|
||
<programlisting>[NetDev]
|
||
Name=veth-test
|
||
Kind=veth
|
||
|
||
[Peer]
|
||
Name=veth-peer</programlisting>
|
||
</example>
|
||
|
||
<example>
|
||
<title>/etc/systemd/network/dummy.netdev</title>
|
||
<programlisting>[NetDev]
|
||
Name=dummy-test
|
||
Kind=dummy
|
||
MACAddress=12:34:56:78:9a:bc</programlisting>
|
||
</example>
|
||
|
||
</refsect1>
|
||
<refsect1>
|
||
<title>See Also</title>
|
||
<para>
|
||
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
|
||
<citerefentry><refentrytitle>systemd-networkd</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
|
||
<citerefentry><refentrytitle>systemd.link</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
|
||
<citerefentry><refentrytitle>systemd.network</refentrytitle><manvolnum>5</manvolnum></citerefentry>
|
||
</para>
|
||
</refsect1>
|
||
|
||
</refentry>
|