User manual

5-6
Stress Test
Thoughput
NOTE: Select the red Exit button to go back to the main Stress Test
Screen. Select another result button to view results of the other test.
Throughput
Throughput test results are shown as the maximum number of frames
transmitted and the percent utilization of the total bandwidth with zero lost
frames. One row of data is shown for each enabled frame size (up to 7
rows).
Chapter 5
The above screens show two different examples of Stress Tests:
The left screen shows the test results when Port 1 of a LANEXPERT is
connected to a gigabit switch with Port 2 of the same LANEXPERT also
connected to the gigabit switch. The maximum line rate is 100% of 1000
megabits per second (Mbps). The measured throughput of the switch
under test is 98% of the maximum line rate. 98% of 1000 Mbs is 980Mbps
showing that the switch is operating at full speed.
The right screen shows the test results when a LANEXPERT is
connected to a gigabit switch and then converted and transmitted over a
microwave link with a speed of 155 megabits per second. The microwave
transmission is converted back to copper and connected to a second
gigabit switch which is connected to a second LANEXPERT. The
maximum line rate is limited to the speed of the microwave link of 155Mbps.
Calculated utilization is 155/1000 = 0.155 or 15.5%. Actual tests measured
a 15-16% utilization rate. The difference is due to rounding as only whole
numbers are displayed.