mirror of
https://gitlab.com/shorewall/code.git
synced 2024-11-25 17:13:11 +01:00
649 lines
27 KiB
XML
649 lines
27 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
|
||
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.4//EN"
|
||
"http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd">
|
||
<refentry>
|
||
<refmeta>
|
||
<refentrytitle>shorewall6-tcclasses</refentrytitle>
|
||
|
||
<manvolnum>5</manvolnum>
|
||
</refmeta>
|
||
|
||
<refnamediv>
|
||
<refname>tcclasses</refname>
|
||
|
||
<refpurpose>Shorewall6 file to define HTB and HFSC classes</refpurpose>
|
||
</refnamediv>
|
||
|
||
<refsynopsisdiv>
|
||
<cmdsynopsis>
|
||
<command>/etc/shorewall6/tcclasses</command>
|
||
</cmdsynopsis>
|
||
</refsynopsisdiv>
|
||
|
||
<refsect1>
|
||
<title>Description</title>
|
||
|
||
<para>A note on the <emphasis>rate</emphasis>/bandwidth 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>if you want the values to be calculated for you depending on the
|
||
output bandwidth setting defined for an interface in tcdevices, you
|
||
can use expressions like the following:</para>
|
||
|
||
<variablelist>
|
||
<varlistentry>
|
||
<term>full/3</term>
|
||
|
||
<listitem>
|
||
<para>causes the bandwidth to be calculated as 1/3 of the full
|
||
outgoing speed that is defined.</para>
|
||
</listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term>full*9/10</term>
|
||
|
||
<listitem>
|
||
<para>will set this bandwidth to 9/10 of the full
|
||
bandwidth</para>
|
||
</listitem>
|
||
</varlistentry>
|
||
</variablelist>
|
||
|
||
<para>Note that in a sub-class (a class that has a specified parent
|
||
class), full refers to the RATE or CEIL of the parent class rather
|
||
than to the OUT-BANDWIDTH of the device.</para>
|
||
|
||
<para>DO NOT add a unit to the rate if it is calculated !</para>
|
||
</listitem>
|
||
</itemizedlist>
|
||
|
||
<para>The columns in the file are as follows.</para>
|
||
|
||
<variablelist>
|
||
<varlistentry>
|
||
<term><emphasis role="bold">INTERFACE</emphasis> -
|
||
<emphasis>interface</emphasis>[[:<emphasis>parent</emphasis>]:<emphasis>class</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 specify either the interface number or the interface
|
||
name. If the <emphasis role="bold">classify</emphasis> option is
|
||
given for the interface in <ulink
|
||
url="shorewall6-tcdevices.html">shorewall6-tcdevices</ulink>(5),
|
||
then you must also specify an interface class (an integer that must
|
||
be unique within classes associated with this interface).</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>Please note that you can only use interface names in here that
|
||
have a bandwidth defined in the <ulink
|
||
url="shorewall6-tcdevices.html">shorewall6-tcdevices</ulink>(5)
|
||
file.</para>
|
||
|
||
<para>Normally, all classes defined here are sub-classes of a root
|
||
class (class number 1) that is implicitly defined from the entry in
|
||
<ulink
|
||
url="shorewall6-tcdevices.html">shorewall6-tcdevices</ulink>(5). You
|
||
can establish a class hierarchy by specifying a
|
||
<emphasis>parent</emphasis> class -- the number of a class that you
|
||
have previously defined. The sub-class may borrow unused bandwidth
|
||
from its parent.</para>
|
||
</listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term><emphasis role="bold">MARK</emphasis> -
|
||
{-|<emphasis>value</emphasis>}</term>
|
||
|
||
<listitem>
|
||
<para>The mark <emphasis>value</emphasis> which is an integer in the
|
||
range 1-255. You set mark values in the <ulink
|
||
url="shorewall6-tcrules.html">shorewall6-tcrules</ulink>(5) file,
|
||
marking the traffic you want to fit in the classes defined in here.
|
||
Must be specified as '-' if the <emphasis
|
||
role="bold">classify</emphasis> option is given for the interface in
|
||
<ulink
|
||
url="shorewall6-tcdevices.html">shorewall6-tcdevices</ulink>(5) and
|
||
you are running Shorewall 4.5 5 or earlier.</para>
|
||
|
||
<para>You can use the same marks for different interfaces.</para>
|
||
</listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term><emphasis role="bold">RATE</emphasis> -
|
||
{-|<emphasis>rate</emphasis>[:<emphasis>dmax</emphasis>[:<emphasis>umax</emphasis>]]}</term>
|
||
|
||
<listitem>
|
||
<para>The minimum bandwidth this class should get, when the traffic
|
||
load rises. If the sum of the rates in this column exceeds the
|
||
INTERFACE's OUT-BANDWIDTH, then the OUT-BANDWIDTH limit may not be
|
||
honored. Similarly, if the sum of the rates of sub-classes of a
|
||
class exceed the CEIL of the parent class, things don't work
|
||
well.</para>
|
||
|
||
<para>When using the HFSC queuing discipline, this column specify
|
||
the real-time (RT) service curve. leaf classes may specify
|
||
<replaceable>dmax</replaceable>, the maximum delay in milliseconds
|
||
that the first queued packet for this class should experience. May
|
||
be expressed as an integer, optionally followed by 'ms' with no
|
||
intervening white space (e.g., 10ms).</para>
|
||
|
||
<para>HFSC leaf classes may also specify
|
||
<replaceable>umax</replaceable>, the largest packet expected in this
|
||
class. May be expressed as an integer. The unit of measure is
|
||
<emphasis>bytes</emphasis> and the integer may be optionally
|
||
followed by 'b' with no intervening white space (e.g., 800b).
|
||
<replaceable>umax</replaceable> may only be given if
|
||
<replaceable>dmax</replaceable> is also given.</para>
|
||
|
||
<para>Beginning with Shorewall 4.5.6, HFSC classes may omit this
|
||
column (e.g, '-' in the column), provided that an
|
||
<replaceable>lsrate</replaceable> is specified (see CEIL below).
|
||
These rates are used to arbitrate between classes of the same
|
||
priority.</para>
|
||
</listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term><emphasis role="bold">CEIL</emphasis> -
|
||
[<emphasis>lsrate</emphasis>:]<emphasis>rate</emphasis></term>
|
||
|
||
<listitem>
|
||
<para>The maximum bandwidth this class is allowed to use when the
|
||
link is idle. Useful if you have traffic which can get full speed
|
||
when more needed services (e.g. ssh) are not used.</para>
|
||
|
||
<para>You can use the value <emphasis role="bold">full</emphasis> in
|
||
here for setting the maximum bandwidth to the RATE of the parent
|
||
class, or the OUT-BANDWIDTH of the device if there is no parent
|
||
class.</para>
|
||
|
||
<para>Beginning with Shorewall 4.5.6, you can also specify an
|
||
<replaceable>lsrate</replaceable> (link sharing rate).</para>
|
||
</listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term><emphasis role="bold">PRIORITY</emphasis> -
|
||
<emphasis>priority</emphasis></term>
|
||
|
||
<listitem>
|
||
<para>For HTB:</para>
|
||
|
||
<blockquote>
|
||
<para>The <emphasis>priority</emphasis> in which classes will be
|
||
serviced by the packet shaping scheduler and also the priority in
|
||
which bandwidth in excess of the rate will be given to each
|
||
class.</para>
|
||
|
||
<para>Higher priority classes will experience less delay since
|
||
they are serviced first. Priority values are serviced in ascending
|
||
order (e.g. 0 is higher priority than 1).</para>
|
||
|
||
<para>Classes may be set to the same priority, in which case they
|
||
will be serviced as equals.</para>
|
||
</blockquote>
|
||
|
||
<para>For both HTB and HFSC, the <emphasis>priority</emphasis> is
|
||
used to calculate the priority of following Shorewall-generated
|
||
classification filters that refer to the class:</para>
|
||
|
||
<itemizedlist>
|
||
<listitem>
|
||
<para>Packet MARK</para>
|
||
</listitem>
|
||
|
||
<listitem>
|
||
<para><emphasis role="bold">tcp-ack</emphasis> and the <emphasis
|
||
role="bold">tos</emphasis> options (see below)</para>
|
||
</listitem>
|
||
</itemizedlist>
|
||
|
||
<para>The rules for classes with lower numeric priorities will
|
||
appear before those with higher numeric priorities.</para>
|
||
|
||
<para>Beginning with Shorewall 4.5.8, the PRIORITY may be omitted
|
||
from an HFSC class if you do not use the MARK column or the
|
||
<emphasis role="bold">tcp-ack</emphasis> or <emphasis
|
||
role="bold">tos</emphasis> options. If you use those features and
|
||
omit the PRIORITY, then you must specify a
|
||
<replaceable>priority</replaceable> along with the MARK or
|
||
option.</para>
|
||
</listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term><emphasis role="bold">OPTIONS</emphasis> (Optional) -
|
||
[<emphasis>option</emphasis>[<emphasis
|
||
role="bold">,</emphasis><emphasis>option</emphasis>]...]</term>
|
||
|
||
<listitem>
|
||
<para>A comma-separated list of options including the
|
||
following:</para>
|
||
|
||
<variablelist>
|
||
<varlistentry>
|
||
<term><emphasis role="bold">default</emphasis></term>
|
||
|
||
<listitem>
|
||
<para>This is the default class for that interface where all
|
||
traffic should go, that is not classified otherwise.</para>
|
||
|
||
<note>
|
||
<para>You must define <emphasis
|
||
role="bold">default</emphasis> for exactly one class per
|
||
interface.</para>
|
||
</note>
|
||
</listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term><emphasis
|
||
role="bold">tos=0x</emphasis><emphasis>value</emphasis>[/0x<emphasis>mask</emphasis>][:<replaceable>priority</replaceable>]
|
||
(mask defaults to 0xff)</term>
|
||
|
||
<listitem>
|
||
<para>This lets you define a classifier for the given
|
||
<emphasis>value</emphasis>/<emphasis>mask</emphasis>
|
||
combination of the IP packet's TOS/Precedence/DiffSrv octet
|
||
(aka the TOS byte).</para>
|
||
|
||
<para>Beginning with Shorewall 4.5.8, the
|
||
<replaceable>value/mask</replaceable> may be followed by a
|
||
colon (":") and a <replaceable>priority</replaceable>. This
|
||
priority determines the order in which filter rules are
|
||
processed during packet classification. If not specified, the
|
||
value (<replaceable>class priority</replaceable> << 8) |
|
||
10) is used.</para>
|
||
</listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term><emphasis
|
||
role="bold">tos-</emphasis><emphasis>tosname</emphasis>[:<replaceable>priority</replaceable>]</term>
|
||
|
||
<listitem>
|
||
<para>Aliases for the following TOS octet value and mask
|
||
encodings. TOS encodings of the "TOS byte" have been
|
||
deprecated in favor of diffserve classes, but programs like
|
||
ssh, rlogin, and ftp still use them.</para>
|
||
|
||
<programlisting> <emphasis role="bold">tos-minimize-delay</emphasis> 0x10/0x10
|
||
<emphasis role="bold">tos-maximize-throughput</emphasis> 0x08/0x08
|
||
<emphasis role="bold">tos-maximize-reliability</emphasis> 0x04/0x04
|
||
<emphasis role="bold">tos-minimize-cost</emphasis> 0x02/0x02
|
||
<emphasis role="bold">tos-normal-service</emphasis> 0x00/0x1e</programlisting>
|
||
|
||
<para>Beginning with Shorewall 4.5.8, the
|
||
<replaceable>tos-name</replaceable> may be followed by a colon
|
||
(":") and a <replaceable>priority</replaceable>. This priority
|
||
determines the order in which filter rules are processed
|
||
during packet classification. If not specified, the value
|
||
(<replaceable>class priority</replaceable> << 8) | 10)
|
||
is used.</para>
|
||
|
||
<note>
|
||
<para>Each of these options is only valid for ONE class per
|
||
interface.</para>
|
||
</note>
|
||
</listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term><emphasis
|
||
role="bold">tcp-ack</emphasis>[:<replaceable>priority</replaceable>]</term>
|
||
|
||
<listitem>
|
||
<para>If defined, causes a tc filter to be created that puts
|
||
all tcp ack packets on that interface that have a size of
|
||
<=64 Bytes to go in this class. This is useful for speeding
|
||
up downloads. Please note that the size of the ack packets is
|
||
limited to 64 bytes because we want only packets WITHOUT
|
||
payload to match.</para>
|
||
|
||
<para>Beginning with Shorewall 4.5.8, the <emphasis
|
||
role="bold">tcp-ack</emphasis> may be followed by a colon
|
||
(":") and a <replaceable>priority</replaceable>. This priority
|
||
determines the order in which filter rules are processed
|
||
during packet classification. If not specified, the value
|
||
(<replaceable>class priority</replaceable> << 8) | 20)
|
||
is used.</para>
|
||
|
||
<note>
|
||
<para>This option is only valid for ONE class per
|
||
interface.</para>
|
||
</note>
|
||
</listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term>flow=<emphasis>keys</emphasis></term>
|
||
|
||
<listitem>
|
||
<para>Shorewall attaches an SFQ queuing discipline to each
|
||
leaf HTB class. SFQ ensures that each
|
||
<firstterm>flow</firstterm> gets equal access to the
|
||
interface. The default definition of a flow corresponds
|
||
roughly to a Netfilter connection. So if one internal system
|
||
is running BitTorrent, for example, it can have lots of
|
||
'flows' and can thus take up a larger share of the bandwidth
|
||
than a system having only a single active connection. The
|
||
<option>flow</option> classifier (module cls_flow) works
|
||
around this by letting you define what a 'flow' is. The
|
||
clasifier must be used carefully or it can block off all
|
||
traffic on an interface! The flow option can be specified for
|
||
an HTB leaf class (one that has no sub-classes). We recommend
|
||
that you use the following:</para>
|
||
|
||
<simplelist>
|
||
<member>Shaping internet-bound traffic:
|
||
flow=nfct-src</member>
|
||
|
||
<member>Shaping traffic bound for your local net:
|
||
flow=dst</member>
|
||
</simplelist>
|
||
|
||
<para>These will cause a 'flow' to consists of the traffic
|
||
to/from each internal system.</para>
|
||
|
||
<para>When more than one key is give, they must be enclosed in
|
||
parenthesis and separated by commas.</para>
|
||
|
||
<para>To see a list of the possible flow keys, run this
|
||
command:</para>
|
||
|
||
<blockquote>
|
||
<para><command>tc filter add flow help</command></para>
|
||
</blockquote>
|
||
|
||
<para>Those that begin with "nfct-" are Netfilter connection
|
||
tracking fields. As shown above, we recommend flow=nfct-src;
|
||
that means that we want to use the source IP address
|
||
<emphasis>before NAT</emphasis> as the key.</para>
|
||
</listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term>pfifo</term>
|
||
|
||
<listitem>
|
||
<para>When specified for a leaf class, the pfifo queing
|
||
discipline is applied to the class rather than the sfq queuing
|
||
discipline.</para>
|
||
</listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term>limit=<emphasis>number</emphasis></term>
|
||
|
||
<listitem>
|
||
<para>Added in Shorewall 4.4.3. When specified for a leaf
|
||
class, determines the maximum number of packets that may be
|
||
queued within the class. The <emphasis>number</emphasis> must
|
||
be > 2 and <= 128. If not specified, the value 127 is
|
||
assumed.</para>
|
||
</listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term>red=(<replaceable>redoption</replaceable>=<replaceable>value</replaceable>,
|
||
...)</term>
|
||
|
||
<listitem>
|
||
<para>Added in Shorewall 4.5.6. When specified on a leaf
|
||
class, causes the class to use the RED (Random Early
|
||
Detection) queuing discipline rather than SFQ. See tc-red (8)
|
||
for additional information.</para>
|
||
|
||
<para>Allowable redoptions are:</para>
|
||
|
||
<variablelist>
|
||
<varlistentry>
|
||
<term>min <replaceable>min</replaceable></term>
|
||
|
||
<listitem>
|
||
<para>Average queue size at which marking becomes a
|
||
possibility.</para>
|
||
</listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term>max <replaceable>max</replaceable></term>
|
||
|
||
<listitem>
|
||
<para>At this average queue size, the marking
|
||
probability is maximal. Must be at least twice
|
||
<replaceable>min</replaceable> to prevent synchronous
|
||
retransmits, higher for low
|
||
<replaceable>min</replaceable>.</para>
|
||
</listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term>probability
|
||
<replaceable>probability</replaceable></term>
|
||
|
||
<listitem>
|
||
<para>Maximum probability for marking, specified as a
|
||
floating point number from 0.0 to 1.0. Suggested values
|
||
are 0.01 or 0.02 (1 or 2%, respectively).</para>
|
||
</listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term>limit <replaceable>limit</replaceable></term>
|
||
|
||
<listitem>
|
||
<para>Hard limit on the real (not average) queue size in
|
||
bytes. Further packets are dropped. Should be set higher
|
||
than
|
||
<replaceable>max</replaceable>+<replaceable>burst</replaceable>.
|
||
It is advised to set this a few times higher than
|
||
<replaceable>max</replaceable>. Shorewall requires that
|
||
<replaceable>limit</replaceable> be at least twice
|
||
<replaceable>min</replaceable>.</para>
|
||
</listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term>burst <replaceable>burst</replaceable></term>
|
||
|
||
<listitem>
|
||
<para>Used for determining how fast the average queue
|
||
size is influenced by the real queue size. Larger values
|
||
make the calculation more sluggish, allowing longer
|
||
bursts of traffic before marking starts. Real life
|
||
experiments support the following guide‐line:
|
||
(<replaceable>min</replaceable>+<replaceable>min</replaceable>+<replaceable>max</replaceable>)/(3*<replaceable>avpkt</replaceable>).</para>
|
||
</listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term>avpkt <replaceable>avpkt</replaceable></term>
|
||
|
||
<listitem>
|
||
<para>Optional. Specified in bytes. Used with burst to
|
||
determine the time constant for average queue size
|
||
calculations. 1000 is a good value and is the Shorewall
|
||
default.</para>
|
||
</listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term>bandwidth
|
||
<replaceable>bandwidth</replaceable></term>
|
||
|
||
<listitem>
|
||
<para>Optional. This rate is used for calculating the
|
||
average queue size after some idle time. Should be set
|
||
to the bandwidth of your interface. Does not mean that
|
||
RED will shape for you!</para>
|
||
</listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term>ecn</term>
|
||
|
||
<listitem>
|
||
<para>RED can either 'mark' or 'drop'. Explicit
|
||
Congestion Notification allows RED to notify remote
|
||
hosts that their rate exceeds the amount of bandwidth
|
||
available. Non-ECN capable hosts can only be notified by
|
||
dropping a packet. If this parameter is specified,
|
||
packets which indicate that their hosts honor ECN will
|
||
only be marked and not dropped, unless the queue size
|
||
hits <replaceable>limit</replaceable> bytes. Needs a tc
|
||
binary with RED support compiled in. Recommended.</para>
|
||
</listitem>
|
||
</varlistentry>
|
||
</variablelist>
|
||
</listitem>
|
||
</varlistentry>
|
||
</variablelist>
|
||
</listitem>
|
||
</varlistentry>
|
||
</variablelist>
|
||
</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. You have 4 classes here, the first you can use
|
||
for voice over IP traffic, the second interactive traffic (e.g.
|
||
ssh/telnet but not scp), the third will be for all unclassified
|
||
traffic, and the forth is for low priority traffic (e.g.
|
||
peer-to-peer).</para>
|
||
|
||
<para>The voice traffic in the first class will be guaranteed a
|
||
minimum of 100kbps and always be serviced first (because of the low
|
||
priority number, giving less delay) and will be granted excess
|
||
bandwidth (up to 180kbps, the class ceiling) first, before any other
|
||
traffic. A single VOIP stream, depending upon codecs, after
|
||
encapsulation, can take up to 80kbps on a PPOE/DSL link, so we pad a
|
||
little bit just in case. (TOS byte values 0xb8 and 0x68 are DiffServ
|
||
classes EF and AFF3-1 respectively and are often used by VOIP
|
||
devices).</para>
|
||
|
||
<para>Interactive traffic (tos-minimum-delay) and TCP acks (and ICMP
|
||
echo traffic if you use the example in tcrules) and any packet with
|
||
a mark of 2 will be guaranteed 1/4 of the link bandwidth, and may
|
||
extend up to full speed of the link.</para>
|
||
|
||
<para>Unclassified traffic and packets marked as 3 will be
|
||
guaranteed 1/4th of the link bandwidth, and may extend to the full
|
||
speed of the link.</para>
|
||
|
||
<para>Packets marked with 4 will be treated as low priority packets.
|
||
(The tcrules example marks p2p traffic as such.) If the link is
|
||
congested, they're only guaranteed 1/8th of the speed, and even if
|
||
the link is empty, can only expand to 80% of link bandwidth just as
|
||
a precaution in case there are upstream queues we didn't account
|
||
for. This is the last class to get additional bandwidth and the last
|
||
to get serviced by the scheduler because of the low priority.</para>
|
||
|
||
<programlisting> #INTERFACE MARK RATE CEIL PRIORITY OPTIONS
|
||
ppp0 1 100kbit 180kbit 1 tos=0x68/0xfc,tos=0xb8/0xfc
|
||
ppp0 2 full/4 full 2 tcp-ack,tos-minimize-delay
|
||
ppp0 3 full/4 full 3 default
|
||
ppp0 4 full/8 full*8/10 4</programlisting>
|
||
</listitem>
|
||
</varlistentry>
|
||
</variablelist>
|
||
</refsect1>
|
||
|
||
<refsect1>
|
||
<title>FILES</title>
|
||
|
||
<para>/etc/shorewall6/tcclasses</para>
|
||
</refsect1>
|
||
|
||
<refsect1>
|
||
<title>See ALSO</title>
|
||
|
||
<para>tc-hfsc(7)</para>
|
||
|
||
<para>tc-red(8)</para>
|
||
|
||
<para><ulink
|
||
url="http://shorewall.net/traffic_shaping.htm">http://shorewall.net/traffic_shaping.htm</ulink></para>
|
||
|
||
<para><ulink
|
||
url="http://shorewall.net/configuration_file_basics.htm#Pairs">http://shorewall.net/configuration_file_basics.htm#Pairs</ulink></para>
|
||
|
||
<para>shorewall6(8), shorewall6-accounting(5), shorewall6-actions(5),
|
||
shorewall6-blacklist(5), shorewall6-hosts(5), shorewall6-interfaces(5),
|
||
shorewall6-maclist(5), shoewall6-netmap(5),shorewall6-params(5),
|
||
shorewall6-policy(5), shorewall6-providers(5), shorewall6-rtrules(5),
|
||
shorewall6-routestopped(5), shorewall6-rules(5), shorewall6.conf(5),
|
||
shorewall6-secmarks(5), shorewall6-tcdevices(5), shorewall6-tcrules(5),
|
||
shorewall6-tos(5), shorewall6-tunnels(5), shorewall6-zones(5)</para>
|
||
</refsect1>
|
||
</refentry>
|