TCP Connectivity to Target Test

The TCP Connectivity to Target test is used to the check the availability of TCP connection between source and destination. Monitoring the TCP connection can help identify potential bottlenecks or issues that may be affecting network performance. By keeping track of availability, you can ensure that the network is operating efficiently and effectively. This test allows you to quickly identify and resolve any connectivity issues that may arise. It can help pinpoint the source of the problem and take corrective action in a timely manner.

Response time is a key indicator of the performance of network paths and connectivity. Slow response times can indicate network congestion, hardware issues, or other problems that may be affecting the overall performance of the network. Monitoring response time can help identify and troubleshoot issues with network paths and connectivity. Using this test, the administrators can track the response time over time, and identify patterns and potential points of failure. This test also helps the administrators to detect and respond to potential security threats, if any.

Target of the test : Network Path

Agent deploying the test : An external agent

Outputs of the test : One set of results measured from eG agent to Host URL: Port.

Configurable parameters for the test
Parameter Description

Test period

How often should the test be executed.

Host

In the Host text box, specify the destination URL for which this test is to be configured.

Port

The port number through which the Network Path communicates.

Targets

Provide a comma-separated list of {Host URL}:{Port} pair combination in the TARGETS text box, which represent the Host URLs (destination) for which the TCP connectivity to be monitored from the server (source) . For example, www.google.com:443,www.npcap.com:443. The test connects to each URL/Port pair combination and monitors the TCP connectivity between the source and the destination. One set of metrics is reported for each target.

Timeout

Specify the duration (in miiliseconds) within which this test should time out in this text box. The default is 500 .

DD Frequency

Refers to the frequency with which detailed diagnosis measures are to be generated for this test. The default is 1:1. This indicates that, by default, detailed measures will be generated every time this test runs, and also every time the test detects a problem. You can modify this frequency, if you so desire. Also, if you intend to disable the detailed diagnosis capability for this test, you can do so by specifying none against DD frequency.

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

Availability

Indicates the availability of TCP connection between the source and destination.

 

The values reported by this measure and its numeric equivalents are mentioned in the table below:

Measure Value

Numeric Value
Non-Reachable 0
Reachable 100

Note:

By default, this measure reports the Measure Values listed in the table above to indicate the availability of TCP connection between the source and destination. However, in the graph of this measure, values will be represented using the corresponding numeric equivalents only.

Response time

Indicates the time taken by the data to travel from source to destination.

Milliseconds

The detailed diagnosis of this measure lists the count of hops, Destination IPs, DNS Name and calculates the average response time taken by each hop.

The detailed diagnosis capability of the Response time measure, if enabled, provides a listing of number of hops (see Figure 1), Destination IPs, DNS Name and the average response time taken by each hop.

Figure 1 : Detailed diagnosis of the Response time measure