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><H1
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><A
NAME="requirements"
></A
>2. Requirements</H1
><P
> There are a few requirements in order for the
<A
HREF="requirements.html#requirements-kernel"
>kernel to support HTB and
DSMARK</A
>,
<A
HREF="requirements.html#requirements-tc"
>tc to support HTB and DSMARK</A
>, and
<A
HREF="requirements.html#requirements-tcng"
>tcng itself</A
>.
</P
><P
> Specifically, support for HTB in the kernel and tc is absolutely required
in order for this tutorial to be remotely useful (refer to the title if
htere is any doubt in your mind). DSMARK support is, strictly speaking,
optional, although some
<A
HREF="examples.html"
>examples</A
> (class selection path, in
particular, but maybe others) may not operate without dsmark support.
</P
><DIV
CLASS="section"
><H2
CLASS="section"
><A
NAME="requirements-kernel"
></A
>2.1. kernel requirements</H2
><P
> The kernel requirements are very easy to meet. Kernel 2.4.20 and newer
include support for HTB and dsmark, so simply be certain that these
options are turned on in the QoS/Fair Queuing portion of your kernel
configuration. For a brief summary of the options to select in kernel
configuration, visit
<A
HREF="http://diffserv.sourceforge.net/#24"
TARGET="_top"
>the DiffServ project
kernel configuration notes</A
>.
</P
><P
> For kernels older than 2.4.20, the following
<A
HREF="http://luxik.cdi.cz/~devik/qos/htb/v3/htb3.6-020525.tgz"
TARGET="_top"
>tarball
containing a patch</A
> should be applied to your 2.4.17 or newer
kernel tree.
</P
></DIV
><DIV
CLASS="section"
><H2
CLASS="section"
><A
NAME="requirements-tc"
></A
>2.2. <B
CLASS="command"
>tc</B
> requirements</H2
><P
> The <B
CLASS="command"
>tc</B
> command is a part of the
<B
CLASS="command"
>iproute2</B
> utility suite. For general documentation on
<B
CLASS="command"
>iproute2</B
>, see
<A
HREF="http://linux-ip.net/"
TARGET="_top"
>http://linux-ip.net/</A
> and
<A
HREF="http://linux-ip.net/gl/ip-cref/"
TARGET="_top"
>the
<B
CLASS="command"
>iproute2</B
> manual</A
>. The software itself is
available directly from
<A
HREF="ftp://ftp.inr.ac.ru/ip-routing/"
TARGET="_top"
>Alexey Kuznetsov'z FTP
archive</A
> but commonly also via packages supplied with your
linux distribution. If your distribution can make use of RPMS, you can
download this
<A
HREF="http://linux-ip.net/traffic-control/iproute-2.4.7-7.src.rpm"
TARGET="_top"
>SRPM</A
>
and compile it on your own system.
</P
><P
> If you need to compile <B
CLASS="command"
>iproute2</B
> yourself, use the
<A
HREF="http://luxik.cdi.cz/~devik/qos/htb/v3/htb3.6-020525.tgz"
TARGET="_top"
>patch
to <B
CLASS="command"
>tc</B
> from this tarball</A
> at
<A
HREF="http://luxik.cdi.cz/~devik/qos/htb/"
TARGET="_top"
>Martin Devera's HTB
site</A
> in order to provide support for HTB in
<B
CLASS="command"
>tc</B
>.
</P
><P
> Your <B
CLASS="command"
>tc</B
> will also need to support dsmark, the
diffserv marking mechanism. Fortunately, this is a simple change to
the <TT
CLASS="filename"
>Config</TT
> file from the
<B
CLASS="command"
>iproute2</B
> source package. Simply change
<TT
CLASS="computeroutput"
>TC_CONFIG_DIFFSERV=n</TT
> to
<TT
CLASS="computeroutput"
>TC_CONFIG_DIFFSERV=y</TT
> and recompile.
</P
><P
> The
<A
HREF="http://linux-ip.net/traffic-control/iproute-2.4.7-7.src.rpm"
TARGET="_top"
>SRPM</A
>
creates a <B
CLASS="command"
>tc</B
> binary with support for
dsmark and for HTB, both of which are required for this example.
</P
></DIV
><DIV
CLASS="section"
><H2
CLASS="section"
><A
NAME="requirements-tcng"
></A
>2.3. <B
CLASS="command"
>tcng</B
> requirements</H2
><P
> Support for <B
CLASS="command"
>tcng</B
> is the easiest part of the process.
Simply untar the tcng source and run <TT
CLASS="userinput"
><B
>./configure
--no-tcsim</B
></TT
> before compiling.
</P
><P
> If you are on an RPM-based system, you can use the SPEC file in
<TT
CLASS="filename"
>tcng/build/tcng.spec</TT
> to build for your
distribution, or you can download and compile this
<A
HREF="http://linux-ip.net/traffic-control/tcng-9d-1.src.rpm"
TARGET="_top"
>SRPM</A
>.
The SRPM produces two packages, tcc and tcc-devel. You need only tcc to
create configurations.
</P
><P
> In order to run the <B
CLASS="command"
>tcc</B
> parser, you will also need to
have the <B
CLASS="command"
>cpp</B
> package installed.
<B
CLASS="command"
>tcc</B
> uses cpp.
</P
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