Cisco CE-507 - Content Engine 507 Manual do utilizador - Página 8
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Introducing the Content Engine
System Hardware Features
Internet or intranet to a distant server farm each time a request is made. The
Content Engine works in tandem with a router to handle web traffic, including
user requests to view pages and graphics (objects) on World Wide Web
servers—whether internal or external to your network.
To deploy Cisco Content Engines with Cisco Cache software within your existing
network, your network must support Cisco IOS software and the Web Cache
Coordination Protocol (WCCP). WCCP redirects Hypertext Transfer Protocol
(HTTP) traffic to a Content Engine, and the Content Engine responds to those
requests.
For example, when a user requests an object from a web server, the router first
sends the request to a Content Engine. If the Content Engine has a copy of the
requested object in storage, the Content Engine sends the user the object.
Otherwise, the Content Engine simultaneously obtains the requested objects from
the Web server, stores a copy of the objects (caches them), and forwards the
objects on to the user.
By caching web objects in this manner, the Content Engine can speed the
satisfaction of user requests when more than one user wants to access the same
objects. Caching in this manner also reduces the amount of traffic between your
network and the Internet, potentially improving your overall network
performance and optimizing your bandwidth usage.
System Hardware Features
Figure 1-3
shows the Content Engine front panel,
Figure 1-4
shows the
Content Engine rear panel with one AC power supply, and
Figure 1-5
shows the
Content Engine rear panel with one DC power supply.
Cisco Content Engine 500 Series Hardware Installation Guide
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