This test monitors the TCP connections to the NetScaler appliance and reports the count of connections that are in various states - i.e., open, closed, opening, closing, etc. In the process, the test holds a mirror to the TCP packet load on the appliance and helps administrators understand the nature of the TCP traffic (SYN, FIN, TIMED_WAIT). In addition, the test also periodically tracks the growth of the Surge Queue of the NetScaler device, and proactively alerts administrators to processing bottlenecks on servers managed by the device.

This page depicts the default parameters that need to be configured for the CtxNsTcpStatsTest.

• The TEST PERIOD list box helps the user to decide how often this test needs to be executed.

• To monitor a NetScaler device, the eG agent should be configured with the credentials of a user with read-only privileges to the target NetScaler device. Specify the credentials of such a user in the NETSCALER USERNAME and NETSCALER PASSWORD text boxes.

• Confirm the password by retyping it in the CONFIRM PASSWORD text box.

• The eG agent collects performance metrics by invoking NITRO (NetScaler Interface Through Restful interfaces and Objects) APIs on the target Netscaler device. Typically, the NITRO APIs can be invoked through the HTTP or the HTTPS mode. By default, the eG agent invokes the NITRO APIs using the HTTPS mode. This is why, the SSL flag is set to Yes by default. If the target Netscaler device is not SSL-enabled, then the NITRO APIs can be accessed through the HTTP mode only. In this case, set the SSL flag to No.

• Once the necessary values have been provided, clicking on the UPDATE button will register the changes made.

When changing default configurations of tests, the values with “$” indicate variables that will be replaced by the eG system according to the specific server being managed - for instance, $hostName is the host/nickname of the target host, $port is the port number of the server being monitored. E.g., for a server xyz:80, $hostName will be changed automatically by the eG manager to “xyz” and $port will be changed to “80” when configuring a test.