eG Monitoring
 

Measures reported by CtxNsLicExpiryTest

To ensure continuous application/service delivery, the NetScaler device should ideally possess a valid license, which should be renewed in time. The license files can either be installed in the target NetScaler device itself or can be managed by a Citrix license server or the license pool of the Citrix Application Delivery Management service. Regardless of where the licenses are located, invalid/out-dated licenses may disable the key features enabled on the NetScaler device or lead the NetScaler to deliver applications with out-dated license information. Sometimes, invalid licenses may completely halt the operations of the NetScaler. leading to the unavailability of the services/applications delivered by the NetScaler device. This would greatly impact the user experience on the NetScaler device. To avoid this, administrators should constantly keep a vigil on the validity of licenses and the license usage. This is where the NetScaler License Information test helps administrators! This test continuously tracks the license usage of NetScaler device, and determines when each license is likely to expire

Using this test, administrators can identify the licenses that are in grace period and plan their license requirements for the future accordingly.

Outputs of the test : One set of results for each lincense type:model of the target Citrix NetScaler being monitored.

The measures made by this test are as follows:

Measurement Description Measurement Unit Interpretation
Days_to_expire Indicates the number of days by which this license will expire. Number This measure will appear only if the Use API flag is set No.

A very low value for this measure indicates that the license is nearing expiry. You may have to request for a license extension if you want to continue using the NetScaler. If the SHOW EXPIRED LICENSE parameter is set to Yes, this test will display -6 against this measure to denote the expired licenses (if any).
Status Indicates whether/not the license server that manages the NetScaler licenses is reachable.   This measure will appear only if the Use API flag is set to Yes.

The numeric values that correspond to these measure values have been given in the table below:

Measure Value Numeric Value
Yes 1
No 0

Note:

By default, the measure reports the Measure Values listed in the table above to indicate the availability of the remote license server. However, in the graph of this measure, the same will be represented using the numeric equivalents only. 
Grace Indicates whether the license of this type is in grace period.   This measure will appear only if the Use API flag is set to Yes.

The numeric values that correspond to these measure values have been given in the table below:

Measure Value Numeric Value
Yes 1
No 0

Note:

By default, the measure reports the Measure Values listed in the table above to indicate whether/not the license of each type is in grace period. However, in the graph of this measure, the same will be represented using the numeric equivalents only. 
Grace_left Indicates the number of days after which the license of this type will expire. Number This measure appears only if the Use API flag is set to Yes and the value of Grace measure is Yes.
Toal_licenses Indicates the total number of licenses of this type installed in the remote license server. Number This measure will appear only if the Use API flag is set to Yes.
Available_licenses Indicates the number of licenses of this type that is currently available to use by the target NetScaler device. Number This measure will appear only if the Use API flag is set to Yes.

Ideally, a high value is preferred for this measure.
Used_licenses Indicates the number of licenses of this type utilized by the target NetScaler device. Number This measure will appear only if the Use API flag is set to Yes.
License_util Indicates the percentage of licenses of this type utilized by the target NetScaler device. Percent This measure will appear only if the Use API flag is set to Yes.

A value close to 100% indicates excessive license utilization. Therefore, administrators need to get additional licenses to ensure license availability for uninterrupted operation of the target NetScaler device.