Installation guide

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Device Manager Guide, Cisco ACE 4700 Series Application Control Engine Appliance
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Chapter 5 Configuring Virtual Servers
Configuring Virtual Servers
Note If you chose an existing sticky group, you can view, modify, or duplicate the selected object’s
existing configuration. See the “Shared Objects and Virtual Servers” section on page 5-9 for
more information about modifying shared objects in virtual servers.
Step 7 In the Compression Method field, select the HTTP compression method to indicate how the ACE
appliance is to compress packets when a client request indicates that the client browser is capable of
packet compression. By default, HTTP compression is disabled in the ACE. When you configure HTTP
compression using the ACE, the ACE compresses data in the HTTP GET responses from the real servers.
The ACE does not compress HTTP requests from clients or the HTTP headers in the server responses.
Note By default, the ACE supports HTTP compression at rates of 100 megabits per second (Mbps).
Installing an optional HTTP compression license allows you to increase this value to a maximum
of 2 Gbps. See the Administration Guide, Cisco ACE Application Control Engine for
information on ACE licensing options.
Options are as follows:
• Deflate—Specifies the deflate compression format as the method to use when the client browser
supports both the deflate and gzip compression methods. deflate, the data format for compression
described in RFC1951
• Gzip—Specifies the gzip compression format as the method to use when the client browser supports
both the deflate and gzip compression methods. Gzip is the file format for compression described
in RFC1952.
• N/A—HTTP compression is disabled.
When configuring HTTP compression, we recommend that you exclude the following MIME types from
HTTP compression: “.*gif”, “.*css”, “.*js”, “.*class”, “.*jar”, “.*cab”, “.*txt”, “.*ps”, “.*vbs”, “.*xsl”,
“.*xml”, “.*pdf”, “.*swf”, “.*jpg”, “.*jpeg”, “.*jpe”, or “.*png”.
Note If you enable the Gzip or Deflate compression format, the DM GUI automatically inserts a L7
Load Balance Primary Action to exclude the MIME types listed above. However, if you disable
HTTP compression later on, you will need to remove the auto-inserted Load Balance Primary
Action.
When you enable HTTP compression, the ACE compresses the packets using the following default
compression parameter values:
• Mime type—All text formats (text/*).
• Minimum size—512 bytes.
• User agent—None.
Step 8 In the SSL Initiation field, select an existing service, or select *New* to create a new service.
Note The SSL Initiation field appears only in the Advanced View, and when TCP is the selected
protocol and Other, HTTP, or HTTPS is the application protocol.