This file is part of systemd.
Copyright 2013 Tom Gundersen
-
- systemd is free software; you can redistribute it and/or modify it
- under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 2.1 of the License, or
- (at your option) any later version.
-
- systemd is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public License
- along with systemd; If not, see <http://www.gnu.org/licenses/>.
-->
<refentry id="systemd.network" conditional='ENABLE_NETWORKD'>
<varlistentry>
<term><varname>IPv6PrefixDelegation=</varname></term>
<listitem><para>Whether to enable or disable Router Advertisement sending on a link.
- Defaults to <literal>false</literal>. See the <literal>[IPv6PrefixDelegation]</literal>
- and the <literal>[IPv6Prefix]</literal> sections for configuration options.
+ Allowed values are <literal>static</literal> which distributes prefixes as defined in
+ the <literal>[IPv6PrefixDelegation]</literal> and any <literal>[IPv6Prefix]</literal>
+ sections, <literal>dhcpv6</literal> which requests prefixes using a DHCPv6 client
+ configured for another link and any values configured in the
+ <literal>[IPv6PrefixDelegation]</literal> section while ignoring all static prefix
+ configuration sections, <literal>yes</literal> which uses both static configuration
+ and DHCPv6, and <literal>false</literal> which turns off IPv6 prefix delegation
+ altogether. Defaults to <literal>false</literal>. See the
+ <literal>[IPv6PrefixDelegation]</literal> and the <literal>[IPv6Prefix]</literal>
+ sections for more configuration options.
+ </para></listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><varname>IPv6MTUBytes=</varname></term>
+ <listitem><para>Configures IPv6 maximum transmission unit (MTU).
+ An integer greater than or equal to 1280 bytes. Defaults to unset.
</para></listitem>
</varlistentry>
<varlistentry>
<varlistentry>
<term><varname>InitialCongestionWindow=</varname></term>
<listitem>
- <para>The TCP initial congestion window or <literal>InitialCongestionWindow</literal> is used during the start
- of a TCP connection. During the start of a TCP session, when a client requests for a resource, the server's initial congestion window
- determines how many data packets will be sent during the initial burst of data. Takes a number between between 1 and 4294967295 (2^32 - 1).
- Defaults to unset.
+ <para>The TCP initial congestion window is used during the start of a TCP connection. During the start of a TCP
+ session, when a client requests a resource, the server's initial congestion window determines how many data bytes
+ will be sent during the initial burst of data. Takes a size in bytes between 1 and 4294967295 (2^32 - 1). The usual
+ suffixes K, M, G are supported and are understood to the base of 1024. Defaults to unset.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>InitialAdvertisedReceiveWindow=</varname></term>
<listitem>
- <para>The TCP receive window size or <literal>InitialAdvertisedReceiveWindow</literal> is the amount of receive data (in bytes)
- that can be buffered at one time on a connection. The sending host can send only that amount of data before waiting for
- an acknowledgment and window update from the receiving host. Takes a number between 1 and 4294967295 (2^32 - 1). Defaults to unset.
+ <para>The TCP initial advertised receive window is the amount of receive data (in bytes) that can initally be buffered at one time
+ on a connection. The sending host can send only that amount of data before waiting for an acknowledgment and window update
+ from the receiving host. Takes a size in bytes between 1 and 4294967295 (2^32 - 1). The usual suffixes K, M, G are supported
+ and are understood to the base of 1024. Defaults to unset.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><varname>QuickAck=</varname></term>
+ <listitem>
+ <para>Takes a boolean argument. When true enables TCP quick ack mode for the route. Defaults to unset.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><varname>ClientIdentifier=</varname></term>
<listitem>
- <para>The DHCPv4 client identifier to use. Either <literal>mac</literal> to use the MAC address of the link
- or <literal>duid</literal> (the default, see below) to use an RFC4361-compliant Client ID.</para>
+ <para>The DHCPv4 client identifier to use. Takes one of <literal>mac</literal>, <literal>duid</literal> or <literal>duid-only</literal>.
+ If set to <literal>mac</literal>, the MAC address of the link is used.
+ If set to <literal>duid</literal>, an RFC4361-compliant Client ID, which is the combination of IAID and DUID (see below), is used.
+ If set to <literal>duid-only</literal>, only DUID is used, this may not be RFC compliant, but some setups may require to use this.
+ Defaults to <literal>duid</literal>.</para>
</listitem>
</varlistentry>
<para>Allow setting custom port for the DHCP client to listen on.</para>
</listitem>
</varlistentry>
+
+ <varlistentry>
+ <term><varname>RapidCommit=</varname></term>
+ <listitem>
+ <para>A boolean. The DHCPv6 client can obtain configuration parameters from a DHCPv6 server through
+ a rapid two-message exchange (solicit and reply). When the rapid commit option is enabled by both
+ the DHCPv6 client and the DHCPv6 server, the two-message exchange is used, rather than the default
+ four-method exchange (solicit, advertise, request, and reply). The two-message exchange provides
+ faster client configuration and is beneficial in environments in which networks are under a heavy load.
+ See <ulink url="https://tools.ietf.org/html/rfc3315#section-17.2.1">RFC 3315</ulink> for details.
+ Defaults to true.</para>
+ </listitem>
+ </varlistentry>
+
</variablelist>
</refsect1>
</variablelist>
</refsect1>
-
<refsect1>
<title>[DHCPServer] Section Options</title>
<para>The <literal>[DHCPServer]</literal> section contains
<listitem>
<para>A boolean. Controls whether the bridge should flood
traffic for which an FDB entry is missing and the destination
- is unknown through this port. Defaults to on.
+ is unknown through this port. Defaults to unset.
</para>
</listitem>
</varlistentry>
<term><varname>HairPin=</varname></term>
<listitem>
<para>A boolean. Configures whether traffic may be sent back
- out of the port on which it was received. By default, this
+ out of the port on which it was received. Defaults to unset. When this
flag is false, and the bridge will not forward traffic back
out of the receiving port.</para>
</listitem>
<term><varname>UseBPDU=</varname></term>
<listitem>
<para>A boolean. Configures whether STP Bridge Protocol Data Units will be
- processed by the bridge port. Defaults to yes.</para>
+ processed by the bridge port. Defaults to unset.</para>
</listitem>
</varlistentry>
<varlistentry>
<listitem>
<para>A boolean. This flag allows the bridge to immediately stop multicast
traffic on a port that receives an IGMP Leave message. It is only used with
- IGMP snooping if enabled on the bridge. Defaults to off.</para>
+ IGMP snooping if enabled on the bridge. Defaults to unset.</para>
</listitem>
</varlistentry>
<varlistentry>
<listitem>
<para>A boolean. Configures whether a given port is allowed to
become a root port. Only used when STP is enabled on the bridge.
- Defaults to on.</para>
+ Defaults to unset.</para>
</listitem>
</varlistentry>
<varlistentry>
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