Configuring the WSM using Device Manager

Content-intelligent Web Cache Redirection

The WSM lets you redirect Web cache requests for browser-smart load balancing, based on different HTTP header information, such as Host: header or User-Agent.

For more information on Layer 4 Web cache redirection, see Application Redirection.

The No Cache/Cache Control for Web Cache Redirection (WCR) off loads non-cacheable content from cache servers. A Cache-Control header in an HTTP 1.1 request identifies the client's caching request. If the Cache-Control: no cache directive is enabled, HTTP 1.1 GET requests are forwarded directly to the origin servers.

Note: Origin server is the server originally specified in the request.

The HTTP 1.0 Pragma: no-cache header is equivalent to the HTTP 1.1 Cache-Control header. By enabling the Pragma: no-cache header, requests are forwarded to the origin server.

Note: For WCR, at any given time, one HTTP header is supported globally for the entire WSM.

This section includes the following topics:

• URL-based Web Cache Redirection
• Configuring HTTP header-based Web Cache Redirection

See also:

• Content-intelligent switching
• Server load balancing basics
• Virtual server load balancing
• Load balancing special services
• Configuring filters for Layer 4 switching