2. Requirements
There are a few requirements in order for the
kernel to support HTB and
DSMARK,
tc to support HTB and DSMARK, and
tcng itself.
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
examples (class selection path, in
particular, but maybe others) may not operate without dsmark support.
2.1. kernel requirements
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
the DiffServ project
kernel configuration notes.
For kernels older than 2.4.20, the following
tarball
containing a patch should be applied to your 2.4.17 or newer
kernel tree.
2.2. tc requirements
The tc command is a part of the
iproute2 utility suite. For general documentation on
iproute2, see
http://linux-ip.net/ and
the
iproute2 manual. The software itself is
available directly from
Alexey Kuznetsov'z FTP
archive but commonly also via packages supplied with your
linux distribution. If your distribution can make use of RPMS, you can
download this
SRPM
and compile it on your own system.
If you need to compile iproute2 yourself, use the
patch
to tc from this tarball at
Martin Devera's HTB
site in order to provide support for HTB in
tc.
Your tc will also need to support dsmark, the
diffserv marking mechanism. Fortunately, this is a simple change to
the Config file from the
iproute2 source package. Simply change
TC_CONFIG_DIFFSERV=n to
TC_CONFIG_DIFFSERV=y and recompile.
The
SRPM
creates a tc binary with support for
dsmark and for HTB, both of which are required for this example.
2.3. tcng requirements
Support for tcng is the easiest part of the process.
Simply untar the tcng source and run ./configure
--no-tcsim before compiling.
If you are on an RPM-based system, you can use the SPEC file in
tcng/build/tcng.spec to build for your
distribution, or you can download and compile this
SRPM.
The SRPM produces two packages, tcc and tcc-devel. You need only tcc to
create configurations.
In order to run the tcc parser, you will also need to
have the cpp package installed.
tcc uses cpp.
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