DNS Resolutions Test

This test performs a forward DNS lookup using the local host name to query the local DNS server in the computer's environment for the computer's IP address, and reports whether the lookup was successful or not.

Target of the test : Any Citrix server

Agent deploying the test : An internal agent

Outputs of the test : One set of results for every server being monitored

Configurable parameters for the test
TEST PERIOD – How often should the test be executed Host – The host for which the test is to be configured Port – Refers to the port used by the Citrix server health monitor test path - Citrix Virtual Apps is bundled with a Health Monitoring and Recovery (HMR) test pack, which provides a standard set of tests that can be configured to monitor the health of many Virtual Apps components and report failures. Since the eG agent runs one of the HMR tests to determine the status of the forward/reverse DNS lookups, you need to configure the eG agent with the full path to the folder containing the HMR test pack. By default, the health monitor test path is set to default. This implies that the eG agent runs the HMR test from its default location, which is: C:\Progra~1\Citrix\HealthMon\Tests\Citrix. However, if the HMR test pack is available in a different location in your Citrix environment, then indicate that location in the health monitor test path text box. For instance, your specification can be: C:\LocalDir\Citrix\HealthMon\Tests\Citrix. reverse lookup enabled - By default, this flag is set to No. This implies that the test will not report the status of the reverse DNS lookup by default. To enable the test to perform reverse DNS lookup and report its success/failure, set this flag to Yes.

Measurements made by the test

Measurement

Description

Measurement Unit

Interpretation

Forward lookup status:

Indicates whether the forward lookup of the IP address from the local DNS is successful or not.

This measure reports a value Success if the IP address lookup is successful and reports a value Failure if the lookup is not successful. The value Failure may also indicate that the returned IP address does not match with that of the IP address that is registered locally.

The numeric values that correspond to the above-mentioned states are as follows:

State	Numeric Value
Success	0
Failure	1

Note:

By default, this measure reports the above-mentioned states while indicating whether the forward lookup of the IP address is successful or not. However, the graph of this measure will represent success and failure using the numeric equivalents- i.e., 0 and 1 - only.

Reverse lookup status:

Indicates whether the reverse lookup of the IP address is successful or not.

This measure reports a value Success if the reverse lookup of the IP address is successful and reports a value Failure if the reverse lookup is not successful.

The numeric values that correspond to the above-mentioned states are as follows:

State	Numeric Value
Success	0
Failure	1

Note:

By default, this measure reports the above-mentioned states while indicating whether the reverse lookup of the IP address is successful or not. However, the graph of this measure will represent success and failure using the numeric equivalents- i.e., 0 and 1 - only.