Installation guide

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Device Manager Guide, Cisco ACE 4700 Series Application Control Engine Appliance
OL-26645-02
Chapter 6 Configuring Real Servers and Server Farms
Configuring Health Monitoring
Table 6-17 HTTP Probe Attributes
Field Action
Port Enter the port number that the probe is to use. By default, the probe uses port
inheritance to determine the port number. For more information, see the
general attribute Port field description.
Request Method Type Select the type of HTTP request method that is to be used for this probe:
• N/A—This option is not defined.
• Get—The HTTP request method is a GET with a URL of “/”. This
request method directs the server to get the page, and the ACE calculates
a hash value for the content of the page. If the page content information
changes, the hash value no longer matches the original hash value and
the ACE assumes the service is down. This is the default request
method.
• Head—The server is to only get the header for the page. Using this
method can prevent the ACE from assuming that the service is down due
to changed content and therefore changed hash values.
Request HTTP URL This field appears if you select Head or Get in the Request Method Type
field.
Enter the URL path on the remote server. Valid entries are strings of up to
255 characters specifying the URL path. The default path is “/’.
More Settings
TCP Connection
Termination
Check box that when checked, configures the ACE to terminate TCP
connections gracefully by sending a FIN to the server. Uncheck the check
box to configure the ACE to terminate a TCP connection by sending an RST.
Append Port Host Tag Check the check box to append port information in the HTTP Host header
when you configure a non-default destination port for an HTTP probe. Clear
the check box to not append the port information in the HTTP Host header.
Open Timeout
(Seconds)
Enter the number of seconds to wait when opening a connection with a real
server. Valid entries are integers from 1 to 65535, and the default value is 1.
User Name Enter the user identifier to be used for authentication on the real server. Valid
entries are unquoted text strings with a maximum of 64 characters.
Password Enter the password to be used for authentication on the real server. Valid
entries are unquoted text strings with a maximum of 64 characters.
Reenter the password in the Confirm field.
Expect Regular
Expression
Enter the expected response data from the probe destination. Valid entries
are text strings (quotes allowed) with a maximum of 255 characters.
Expect Regex Offset Enter the number of characters into the received message or buffer where the
ACE is to begin looking for the string specified in the Expect Regular
Expression field. Valid entries are integers from 1 to 4000.