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.. include:: ../../common.defs

.. _traffic_wccp:

traffic_wccp
************

Description
===========

Front end to the wccp client library.  It is a stand alone program that speaks
the client side of the WCCP cache protocol.

It can be used instead of the built in WCCP feature in |TS|.
This can be beneficial if you have multiple programs running on the same
computer that are relying on WCCP to redirect traffic from the router to
the computer.

Since it relies on the wccp library, :program:`traffic_wccp` is only built if
|TS| is configured with ``--enable-wccp``.

The overall Apache Traffic Server WCCP configuration documentation is
at :ref:`WCCP Configuration <wccp-configuration>`

Options
=======

.. program:: traffic_wccp

.. option:: --address IP address to bind.

.. option:: --router Bootstrap IP address for routers.

.. option:: --service Path to service group definitions.

.. option:: --debug Print debugging information.

.. option:: --daemon Run as daemon.

You need to run at least with the ``--service`` arguments. An example service
definition file, ``service-nogre-example.config``, is included in the
``src/traffic_wccp`` directory. In this file you define your MD5 security
password (highly recommended), and you define your service groups. The details
of the service file are defined at :ref:`admin-wccp-service-config`.

Limitations
===========

The current WCCP implementation associated with ATS only supports one cache
client per service group per router.  The cache assignment logic currently
assigns the current cache client to all buckets.