About the Session Loading Test
With the Session Loading test you can test the SUT's ability to process a mix of activities for a long period of time, as it would in a commercial network. This test is available in all test cases. You can define a real-world activity model for the test so that the SUT is handling multiple events, such as session connects and disconnects, at the same time. You can further refine the activity model by adding data traffic, where available, and applying distribution models to the control and data traffic rates.
The Session Loading test begins by establishing sessions at the session connect rate. Each session is maintained for its hold time and then disconnected when the hold time expires. The session is left idle for a pending time and then re-established when the pending time expires. You define the rate at which the sessions are initially connected, and the hold and pending times. Each session uses independent hold and pending timers. The hold timer begins when the session is connected and the pending timer begins when the session is disconnected.
The test continues in this manner through the duration of the test session or until the test is stopped manually or with Automation Control. At that time, all sessions are disconnected at your defined disconnect rate.
The Session Loading test is available in all test cases.
AAA Testing
When running a Session Loading test against a AAA server, the method of connecting a RADIUS session... can differ depending on the AAA Test you selected. The disconnect rate only applies to accounting sessions.
If accounting transactions are included in the test, Interim accounting updates can continue to generate traffic towards the AAA server after an accounting session is successfully established.
UMTS Testing
In the default configuration, a UMTS Session Loading test includes MN attaches and detaches in the session loading cycle. MNs are attached, any PDP contexts are created, the test waits for the hold time, any active PDP contexts are deleted, and the attached MNs are detached. When your test includes PDP contexts, you can configure the session loading cycle to only create and delete PDP contexts while the MNs remain attached through the life of the test. The Load Test PDP Contexts Only check box determines the cycle configuration.
Compatible Test Options
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The Data Traffic option can be used in test cases with data traffic capability. Bearer traffic using the data protocol, volume, and rate that you define is transmitted through the established sessions, adding to the real-world activity model.
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The SUT Query option can be used to monitor the SUT CPU usage or dynamically adjust the connect and disconnect rates to based on the CPU usage.