Netscout OneTouch AT G2, Руководство пользователя, Страница: 155 / 396

Chapter 5: User Tests
Wired Performance Test
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Port specifies the UDP port for the test’s control connection.
The same port must be specified on a peer endpoint. The next
two higher port numbers are also used for the test. See “How
it Works,” below.
Run the Test
To run the test, ensure that you have started the endpoint, then
start the Wired Performance Test by tapping AutoTest or TEST
AGAIN on the Wired Performance Test RESULTS tab.
How it Works
For each test, a TCP control connection is established on the port
specified in the test configuration. UDP packets are sent as test
traffic. For the latency test, the next higher port (configured port
+1) is used for exchanging latency measurement frames.
When using a peer endpoint (a OneTouch AT analyzer), separate
upstream and downstream measurements are provided for rate,
frames sent, frames received, and lost frames. Latency and jitter
measurements are always made on the roundtrip.
When using a reflector endpoint all measurements are made on
the roundtrip.
Results
The test will fail if the upstream or downstream connection fails
or cannot be established, or if the configured Allowed Loss value
is exceeded.