VeEX MTX150 Series, User Manual

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61 © VeEX Inc. All Rights Reserved. Ethernet
The selected tests will run automatically. When all the tests are complete the test will stop automatically. If the
BERT test suite needs to be stopped before they are done, then simply press the
Stop button, located in the
actions drop-down menu. The status of each selected test can be seen in the Results tab.
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Far-End Unit Controlled with Loop Up/Down Commands
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If the far-end unit is not manually looped back, then it must first receive a loop up command
from the control unit before the BERT test suite can be started.
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To loop up the far-end unit with the manual mode loop up/down commands, configure the con-
trol settings mode to manual.
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Enter the MAC and/or IP address of the far-end unit.
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Send the loop up command by pressing Loop Up .
Once the far-end unit has been looped back, start the test by pressing the Start button. When the all of the
selected test are completed, the BERT test suite will stop automatically. Once all tests have been completed
and there is no need to test again, go back to the Control tab, and press the
Loop Down button. This will send
a loop down command to the far-end unit to remove the loopback that is in place.
BERT Results
Summary
Summary tab: The following results including the Start (ST) and Elapsed (ET) times are displayed:
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Line Rate (Mbps) : Negotiated rate of the interface (10M, 100M, or 1000M). This value is always
fixed since it depends on the maximum capacity of the link under test, hence the test interface that is
configured.
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Framed Rate: (P MAC/IP VLAN Tag + Type/ CRC) / (P Total
Overhead) * Line Rate % (in Mbps).
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Data Rate: Payload / (P Total Overhead) * Line Rate %.
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Utilization: % of Line Rate. For example, if we transmit 100Mbps on a 1Gbps interface then the util-
ization value is 10% (or 100Mbps) of the total link capacity (or Line Rate).
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Number of bytes
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Pause Frames: Total number of transmitted and received ethernet pause flow-control frames.