Configuring the WSM using Device Manager

Configuring Web Cache Redirection

To configure Web Cache Redirection:

1. Install transparent Web cache software on all three Web cache servers.
2. Define an IP interface on the WSM. See Defining an IP interface on the WSM.

Since, by default, the WSM only remaps destination MAC addresses, it must have an IP interface on the same subnet as the three Web cache servers.

3. Define each Web cache real server. See Configuring each real server. Set the following parameters:

­	Real Server = <assign a real server number, 1-1024>

­	IP Address = <actual IP Address of the Web cache server>

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State = Enabled Note: The Web cache real servers must be in the same VLAN and must have an IP route to the WSM that performs the WCR. In addition, the path from the WSM to the real servers must not contain a router. The router stops HTTP requests from reaching the Web cache servers and, instead, directs them back out to the Internet.

4. Define a real server group and add the Web cache servers to it. See Configuring a real server group. Set the following parameters:

­	Metric = minmisses

­	Real Servers = <Web cache real server numbers>

5. Configure the ports supporting application redirection. See Configuring ports for server load balancing. Set the following parameter:

­	Load Balance State = None (this is the default setting) Note: Do not enable server processing on a port with Application Redirection enabled. Server processing is used only with SLB.

6. Create a filter that will intercept and redirect all client HTTP requests. See Creating a new filter. Set the parameters in the following table.

The filter must intercept all TCP traffic for the HTTP destination port and redirect it to a real server TCP or UDP port. This port is called the redirection port, and is used when performing Layer 4 health checks of TCP services. Filter field Setting Index <Filter index number> Name Web Cache Redirection Filter Enabled Action Redirect Source IP Address Any Destination IP Address Any Protocol TCP Source Port Any Destination Port <To an HTTP destination port> Redirection Port <The redirection port number> Redirection Group <The Web Cache Redirection Real Server Group number> Note: If the transparent proxy occurs on the WSM, make sure to use the service port required by the specific software package. For more about IP proxy addresses, see Configuring IP proxies with Application Redirection.

7. Create a default filter to allow noncached traffic to proceed normally. See Configuring a default filter. Set the parameters in the following table.
   
   

   Filter field	Setting
   Index	<Filter index number>
   Name	Default
   Filter	Enabled
   Action	Allow
   Source IP Address	Any
   Destination IP Address	Any
   Protocol	Any

   
   
   
   

   Note: When the filter's Protocol field is not set to TCP or UDP, then its Source Port and Destination Port are ignored.

   
   
8. Configure the filters on the client ports. See Enabling or disabling filtering on a port and Applying filters to a port.
9. Enable SLB. See Enabling or disabling server load balancing.

SLB must be enabled for application redirection to work properly.

See also:

• Layer 4 Switching Filters--Filters fields
• About Application Redirection
• Configuring delayed binding for Web Cache Redirection
• Configuring RTSP for Web Cache Redirection
• Configuring RTSP Layer 4 load balancing
• Configuring IP proxies with Application Redirection
• Excluding noncacheable sites
• Virtual server load balancing