Specifications

22
Release Notes for Cisco IOS Release 12.0 S
78-7130-11 Rev. B0
New and Changed Information
WCCP Enhancements
Platforms: Cisco 7200 series, Cisco 7500/RSP series
WCCP enhancements add support for WCCP Version 2 for Cisco IOS Release 12.0(11)S. The WCCP
feature allows you to use Cisco cache engines or third-party cache engines to handle web traffic,
reducing transmission costs and downloading time. This traffic includes user requests to view pages and
graphics on World Wide Web servers, whether internal or external to your network, and the replies to
those requests. When a user requests a page from a Web server (located in the Internet), the router sends
the request to a cache engine. If the cache engine has a copy of the requested page in storage, the cache
engine sends the user that page. Otherwise, the cache engine retrieves the requested page and the objects
on that page from the web server, stores a copy of the page and its objects, and forwards the page and
objects to the user.
WCCP transparently redirects a variety of traffic types, specified by protocol (TCP or UDP) and port.
Cisco Cache Engines support only redirection of HTTP (TCP port 80) traffic requests from the intended
server to a cache engine. End users do not know that the page came from the cache engine rather than
the originally requested Web server.
WCCP v2 for Cisco IOS 12.0 S now contains the following new features:
• Distributed CEF Support
• Input Feature
• Flow Acceleration
• Policy Redirection
See the following document for further information:
http://www.cisco.com/univercd/cc/td/doc/product/software/ios120/120newft/120limit/120s/120s11/in
dex.htm