<?xml version="1.0" encoding="UTF-8"?>
<refentry>
  <refmeta>
    <refentrytitle>shorewall-tcdevices</refentrytitle>

    <manvolnum>5</manvolnum>
  </refmeta>

  <refnamediv>
    <refname>tcdevices</refname>

    <refpurpose>Shorewall Traffic Shaping Devices file</refpurpose>
  </refnamediv>

  <refsynopsisdiv>
    <cmdsynopsis>
      <command>/etc/shorewall/tcdevices</command>
    </cmdsynopsis>
  </refsynopsisdiv>

  <refsect1>
    <title>Description</title>

    <para>Entries in this file define the bandwidth for interfaces on which
    you want traffic shaping to be enabled.</para>

    <para>If you do not plan to use traffic shaping for a device, don't put it
    in here as it limits the troughput of that device to the limits you set
    here.</para>

    <para>A note on the <emphasis>bandwidth</emphasis> definitions used in
    this file:</para>

    <itemizedlist>
      <listitem>
        <para>don't use a space between the integer value and the unit: 30kbit
        is valid while 30 kbit is not.</para>
      </listitem>

      <listitem>
        <para>you can use one of the following units:</para>

        <variablelist>
          <varlistentry>
            <term><emphasis role="bold">kpbs</emphasis></term>

            <listitem>
              <para>Kilobytes per second.</para>
            </listitem>
          </varlistentry>

          <varlistentry>
            <term><emphasis role="bold">mbps</emphasis></term>

            <listitem>
              <para>Megabytes per second.</para>
            </listitem>
          </varlistentry>

          <varlistentry>
            <term><emphasis role="bold">kbit</emphasis></term>

            <listitem>
              <para>Kilobits per second.</para>
            </listitem>
          </varlistentry>

          <varlistentry>
            <term><emphasis role="bold">mbit</emphasis></term>

            <listitem>
              <para>Megabits per second.</para>
            </listitem>
          </varlistentry>

          <varlistentry>
            <term><emphasis role="bold">bps</emphasis> or <emphasis
            role="bold">number</emphasis></term>

            <listitem>
              <para>Bytes per second.</para>
            </listitem>
          </varlistentry>
        </variablelist>
      </listitem>

      <listitem>
        <para>Only whole integers are allowed.</para>
      </listitem>
    </itemizedlist>

    <para>The columns in the file are as follows.</para>

    <variablelist>
      <varlistentry>
        <term><emphasis role="bold">INTERFACE</emphasis> —
        <emphasis>interface</emphasis></term>

        <listitem>
          <para>Name of <emphasis>interface</emphasis>. Each interface may be
          listed only once in this file. You may NOT specify the name of an
          alias (e.g., eth0:0) here; see <ulink
          url="http://www.shorewall.net/FAQ.htm#faq18">http://www.shorewall.net/FAQ.htm#faq18</ulink></para>

          <para>You may NOT specify wildcards here, e.g. if you have multiple
          ppp interfaces, you need to put them all in here!</para>

          <para>If the device doesn't exist, a warning message will be issued
          during "shorewall [re]start" and "shorewall refresh" and traffic
          shaping configuration will be skipped for that device.</para>
        </listitem>
      </varlistentry>

      <varlistentry>
        <term><emphasis role="bold">IN-BANDWIDTH</emphasis> —
        <emphasis>bandwidth</emphasis></term>

        <listitem>
          <para>The incoming <emphasis>bandwidth</emphasis> of that interface.
          Please note that you are not able to do traffic shaping on incoming
          traffic, as the traffic is already received before you could do so.
          But this allows you to define the maximum traffic allowed for this
          interface in total, if the rate is exceeded, the packets are
          dropped. You want this mainly if you have a DSL or Cable connection
          to avoid queuing at your providers side.</para>

          <para>If you don't want any traffic to be dropped, set this to a
          value to zero in which case Shorewall will not create an ingress
          qdisc.</para>
        </listitem>
      </varlistentry>

      <varlistentry>
        <term><emphasis role="bold">OUT-BANDWIDTH</emphasis> —
        <emphasis>bandwidth</emphasis></term>

        <listitem>
          <para>The outgoing <emphasis>bandwidth</emphasis> of that interface.
          This is the maximum speed your connection can handle. It is also the
          speed you can refer as "full" if you define the tc classes. Outgoing
          traffic above this rate will be dropped.</para>
        </listitem>
      </varlistentry>
    </variablelist>

    <warning>
      <para>This file is currently limited to ten (10) entries. Additional
      entries will cause run-time errors in the generated firewall
      script.</para>
    </warning>
  </refsect1>

  <refsect1>
    <title>Examples</title>

    <variablelist>
      <varlistentry>
        <term>Example 1:</term>

        <listitem>
          <para>Suppose you are using PPP over Ethernet (DSL) and ppp0 is the
          interface for this. The device has an outgoing bandwidth of 500kbit
          and an incoming bandwidth of 6000kbit</para>

          <programlisting>        #INTERFACE   IN-BANDWIDTH    OUT-BANDWIDTH
        ppp0         6000kbit        500kbit</programlisting>
        </listitem>
      </varlistentry>
    </variablelist>
  </refsect1>

  <refsect1>
    <title>FILES</title>

    <para>/etc/shorewall/tcdevices</para>
  </refsect1>

  <refsect1>
    <title>See ALSO</title>

    <para><ulink
    url="http://shorewall.net/traffic_shaping.htm">http://shorewall.net/traffic_shaping.htm</ulink></para>

    <para>shorewall(8), shorewall-accounting(5), shorewall-actions(5),
    shorewall-blacklist(5), shorewall-hosts(5), shorewall-interfaces(5),
    shorewall-ipsec(5), shorewall-maclist(5), shorewall-masq(5),
    shorewall-nat(5), shorewall-netmap(5), shorewall-params(5),
    shorewall-policy(5), shorewall-providers(5), shorewall-proxyarp(5),
    shorewall-route_rules(5), shorewall-routestopped(5), shorewall-rules(5),
    shorewall.conf(5), shorewall-tcclasses(5), shorewall-tcrules(5),
    shorewall-tos(5), shorewall-tunnels(5), shorewall-zones(5)</para>
  </refsect1>
</refentry>