Name: Cisco ASR 1000 Series
Brand: Cisco
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WCCP Service Groups

WCCP is a component of Cisco IOS software that redirects traffic with defined characteristics from its original

destination to an alternative destination. The typical application of WCCP is to redirect traffic bound for a

remote web server to a local web cache to improve response time and optimize network resource usage.

The nature of the selected traffic for redirection is defined by service groups (see figure below) specified on

content engines and communicated to routers by using WCCP. The maximum number of service groups

allowed across all VRFs is 256.

WCCPv2 supports up to 32 routers per service group. Each service group is established and maintained

independently.

WCCPv2 uses service groups based on logical redirection services, deployed for intercepting and redirecting

traffic. The standard service is web cache, 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. To specify the standard web cache service, use the ip

wccp or the ipv6 wccp command with the web-cache keyword.

More than one service can run on a router at the same time, and routers and content engines can be part

of multiple service groups at the same time.

Note

Figure 5: WCCP Service Groups

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 by the first content

engine to join the group. In a dynamic service, up to eight ports can be specified within a single protocol.

IP Application Services Configuration Guide, Cisco IOS XE Release 3S (Cisco ASR 1000)

Configuring WCCP

WCCP Service Groups

Cisco ASR 1000 Series Configuration Guide

Other manuals for Cisco ASR 1000 Series