DDC License Server Test

A License Server is required to keep track of license utilization in a XenDesktop environment. The non-availability of the license server could have serious repercussions on the operations of the DDC, and can cause significant delays or can even completely stall the delivery of the XenDesktop solution. Using this test, you can promptly detect the unavailability of the License server or capture even the slightest of delays in its responsiveness, so that remedial measures can be initiated before it hampers the delivery of the XenDesktop service. 

Target of the test : A Citrix Delivery Controller v3/4

Agent deploying the test : An internal agent

Outputs of the test : One set of results for the A Citrix Delivery Controller v3/4 that is being monitored.

Configurable parameters for the test
Parameter Description

Test Period

How often should the test be executed.


The IP address of the host for which this test is to be configured.


Refers to the port used by the DDC.


Specify the duration beyond which the test will time out, if no response is received from the DDC. The default value is 30 seconds.

Detailed Diagnosis

To make diagnosis more efficient and accurate, the eG Enterprise embeds an optional detailed diagnostic capability. With this capability, the eG agents can be configured to run detailed, more elaborate tests as and when specific problems are detected. To enable the detailed diagnosis capability of this test for a particular server, choose the On option. To disable the capability, click on the Off option.

The option to selectively enable/disable the detailed diagnosis capability will be available only if the following conditions are fulfilled:

  • The eG manager license should allow the detailed diagnosis capability
  • Both the normal and abnormal frequencies configured for the detailed diagnosis measures should not be 0.
Measurements made by the test
Measurement Description Measurement Unit Interpretation

TCP connection availability

Indicates whether the TCP connection to the XenDesktop Delivery Controller is available.


While the value 100 indicates that the license server is available, the value 0 indicates that it is not.

Response time

Indicates the time taken by the license server to respond to connection requests.


A low value is desired for this measure. A sudden or steady increase in this value could indicate a slowdown while connecting to the license server. This could be owing to a network congestion. Further investigation is however required to isolate the exact reason for the latency.