Cisco Systems 4500 Configuring WCCP

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Software Configuration Guide—Release 15(02)SG
OL-23818-01
Chapter 64 Configuring WCCP Version 2 Services
Configuring WCCP
Configuring WCCP
The following configuration tasks assume that you have already installed and configured the content
engines you want to include in your network. You must configure the content engines in the cluster
before configuring WCCP functionality on your routers.
IP must be configured on the router interface connected to the cache engines. Examples of router
configuration tasks follow this section. For complete descriptions of the command syntax, refer to the
Cisco IOS Configuration Fundamentals Command Reference, Cisco IOS Release 12.3.
These sections describe how to configure WCCP:
• Configuring a Service Group Using WCCP, page 64-6 (Required)
• Using Access Lists for a WCCP Service Group, page 64-8 (Optional)
• Setting a Password for a Router and Cache Engines, page 64-9 (Optional)
Configuring a Service Group Using WCCP
WCCP uses service groups based on logical redirection services. The standard service is the content
engine, which intercepts TCP port 80 (HTTP) traffic and redirects that traffic to the content engines. This
service is referred to as a well-known service, because the characteristics of the web cache service are
known by both the router and content engines. A description of a well-known service is not required
beyond a service identification (the command line interface (CLI) provides a web-cache keyword in the
command syntax).
For information on supported WCCP services with ACNS version 5.2 software, refer to the
Release Notes for Cisco ACNS Software, Release 5.2.3.
In addition to the web cache service, there can be up to seven dynamic services running concurrently on
the switch.
Note More than one service can run on a switch at the same time, and routers and content engines can be part
of multiple service groups at the same time.
The dynamic services are defined by the content engines; the content engine instructs the router which
protocol or ports to intercept, and how to distribute the traffic. The router itself does not have information
on the characteristics of the dynamic service group’s traffic, because this information is provided b y the
first content engine to join the group. In a dynamic service, up to eight ports can be specified within a
single protocol TCP or UDP).
Cisco Content Engines, for example, use dynamic service 99 to specify a reverse-proxy service.
However, other content engines may use this service number for some other service. The following
configuration information deals with enabling general services on Cisco routers. Refer to the content
engine documentation for information on configuring services on content engines.