Optimizing The Test Time - JDS Uniphase hst-3000 User Manual

Chapter 7 Automated RFC 2544 Testing

Optimizing the test time

Optimizing the test time

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When you configure a classic RFC 2544 test, or an Expert
RFC 2544 test in symmetric mode, you can optimize the time
it takes to run the test time by doing the following:
– Ensure that the duration time for the Throughput,
Packet Jitter, and Latency (RTD) tests is the same.
– Ensure that the number of trials for the Latency (RTD) and
Packet Jitter tests is "1" (one trial only).
If you configure the test in this manner, all three tests
(Throughput, Latency, and Packet Jitter) will be run simulta-
neously. If the duration times vary, or if you indicate that you
want to run more than one trial, each test will be executed in
succession. As a result, the test will take longer to complete.
When running the Expert RFC 2544 test in asymmetric mode,
the Latency test is run after the Throughput test, because it
needs the symmetric Throughput measurement before it can
measure latency.
In addition to the duration time and number of trial settings,
you can control the bandwidth transmitted during the course
of the test.
– If you select Top Down, the test transmits traffic at the
maximum bandwidth specified, and then decreases the
bandwidth for each trial by the granularity you specify until
you reach the minimum bandwidth specified.
– If you select Bottom Up, the test transmits traffic at the
minimum bandwidth specified, and then increases the
bandwidth for each trial by the granularity you specify until
you reach the maximum bandwidth specified.
HST-3000 Ethernet Testing User's Guide