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TCP - IGEL Test

This test tracks various statistics pertaining to TCP connections to and from each IGEL Endpoint.

Target of the test : An IGEL Endpoint

Agent deploying the test : A remote agent

Outputs of the test : One set of results for each powered on IGEL Endpoint

Configurable parameters for the test
Parameter	Description
Test Period	How often should the test be executed.
Host	The nick name of the IGEL Endpoints component for which this test is to be configured.
Port	Refers to the port at which the specified host listens to. By default, this is NULL.
Inside View Using	To obtain the 'inside view' of performance of the IGEL Endpoints - i.e., to measure the internal performance of the IGEL Endpoints - this test uses a light-weight Endpoint Agent software deployed on each of the IGEL Endpoints. The Endpoint Agents collect performance metrics from the IGEL Endpoints and communicate the metrics to the eG remote agent using TCP protocol. Accordingly, by default, this parameter is set to eG VM Agent.
Report By User	Since this test runs for an 'IGEL Endpoints' component, this flag is set to No by default.
Report Powered OS	Since this test runs for an 'IGEL Endpoints' component, this flag is set to Yes by default.
Is Cloud VMs	Since this test runs for an 'IGEL Endpoints' component, this flag is set to Yes by default.
Detailed Diagnosis	To make diagnosis more efficient and accurate, the eG suite 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
In connection rate	Indicates the connections per second received by this IGEL Endpoint.	Connections/sec	A high value can indicate an increase in input load.
Out connection rate	Indicates the connections per second initiated by this IGEL Endpoint.	Connections/sec	A high value can indicate that one or more of the applications executing on the IGEL Endpoint have started using a number of TCP connections to some other guest or host.
Current connections	Indicates the currently established connections.	Number	A sudden increase in the number of connections established on an IGEL Endpoint can indicate either an increase in load to one or more of the applications executing on the IGEL Endpoint, or that one or more of the applications are experiencing a problem (e.g., a slow down). Use the detailed diagnosis of this measure to list the foreign IP addresses with maximum number of established TCP connections.
Connection drops	Indicates the rate of established TCP connections dropped from the TCP listen queue.	Connections/sec	This value should be 0 for most of the time. Any non-zero value implies that one or more applications on the IGEL Endpoint are under overload.
Connection failures	Indicates the rate of half open TCP connections dropped from the listen queue.	Connections/sec	This value should be 0 for most of the time. A prolonged non-zero value can indicate either that the server is under SYN attack or that there is a problem with the network link to the server that is resulting in connections being dropped without completion.