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Tweak TC article

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git-svn-id: https://shorewall.svn.sourceforge.net/svnroot/shorewall/trunk@8626 fbd18981-670d-0410-9b5c-8dc0c1a9a2bb
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teastep 2008-07-13 15:34:54 +00:00
parent 3b15b68a8a
commit 2b5826701f
1 changed files with 30 additions and 22 deletions
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52
docs/traffic_shaping.xml
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@ -183,13 +183,16 @@
</blockquote></para>
<para><emphasis role="bold">This is not to say that you cannot shape
downloads, regardless of which Shorewall release you are
download traffic, regardless of which Shorewall release you are
running</emphasis>.</para>
<blockquote>
<para>If you wish to shape downloads, you can always configure traffic
shaping on your firewall's local interface. An example appears <link
linkend="Downloads">below</link>.</para>
<para>Again, however, <emphasis role="bold">this can result in queues
building up both at your ISPs router and at your own</emphasis>.</para>
</blockquote>
<para>You shape and control outgoing traffic by assigning the traffic to
@ -234,7 +237,9 @@
assign connection mark values in
<filename>/etc/shorewall/tcrules</filename>, you can copy the current
packet's mark to the connection mark (SAVE), or you can copy the
connection mark value to the current packet's mark (RESTORE).</para>
connection mark value to the current packet's mark (RESTORE). For more
information, see<ulink url="PacketMarking.html"> this
article</ulink>.</para>
</section>
<section id="Kernel">
@ -266,18 +271,20 @@
<itemizedlist>
<listitem>
<para>Set <emphasis role="bold">TC_ENABLED</emphasis> to "Internal" in
/etc/shorewall/shorewall.conf. Setting TC_ENABLED=Yes causes Shorewall
to look for an external tcstart file (See <link linkend="tcstart">a
later section</link> for details).</para>
<para>Set <emphasis role="bold">TC_ENABLED</emphasis> to "<emphasis
role="bold">Internal</emphasis>" in /etc/shorewall/shorewall.conf.
Setting <emphasis role="bold">TC_ENABLED=Yes</emphasis> causes
Shorewall to look for an external tcstart file (See <link
linkend="tcstart">a later section</link> for details).</para>
</listitem>
<listitem>
<para>Setting <emphasis role="bold">CLEAR_TC</emphasis> parameter in
/etc/shorewall/shorewall.conf to Yes will clear the traffic shaping
configuration during Shorewall [re]start and Shorewall stop. This is
normally what you want when using the builtin support (and also if you
use your own tcstart script)</para>
/etc/shorewall/shorewall.conf to <emphasis role="bold">Yes</emphasis>
will clear the traffic shaping configuration during Shorewall
[re]start and Shorewall stop. This is normally what you want when
using the builtin support (and also if you use your own tcstart
script)</para>
</listitem>
<listitem>
@ -338,13 +345,14 @@
integer numbers are supported (0.5 is <emphasis role="bold">not
valid</emphasis>).</para>
<para>To properly configure the settings for your devices you might need
to find out the real up- and downstream rates you have. This is especially
the case, if you are using a DSL connection or one of another type that do
not have a guaranteed bandwidth. Don't trust the values your provider
tells you for this; especially measuring the real download speed is
important! There are several online tools that help you find out; search
for "dsl speed test" on google (For Germany you can use <ulink
<para><emphasis role="bold">To properly configure the settings for your
devices you need to find out the real up- and downstream rates you
have</emphasis>. This is especially the case, if you are using a DSL
connection or one of another type that do not have a guaranteed bandwidth.
Don't trust the values your provider tells you for this; especially
measuring the real download speed is important! There are several online
tools that help you find out; search for "dsl speed test" on google (For
Germany you can use <ulink
url="http://www.speedcheck.arcor.de/cgi-bin/speedcheck.cgi">arcor speed
check</ulink>). Be sure to choose a test located near you.</para>
@ -390,11 +398,11 @@
shaping incoming traffic, as the traffic is already received before
you could do so. This Column 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.
If you don't want any traffic to be dropped set this to a value
faster than your interface maximum rate (or to 0 (zero), if you are
running Shorewall 3.2.6 or later).</para>
exceeded, the excess packets are dropped. You want this mainly if
you have a DSL or Cable Connection to avoid queuing at your
providers side. If you don't want any traffic to be dropped set this
to a value faster than your interface maximum rate (or to 0 (zero),
if you are running Shorewall 3.2.6 or later).</para>
<para>To determine the optimum value for this setting, we recommend
that you start by setting it significantly below your measured