VeEX RXT-6000e, User Manual

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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.
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13.2.2 BERT Results
13.2.2.1 Summary
Summary tab: The following results including the Start (ST) and Elapsed (ET) times are displayed:
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.
Framed Rate:
(P MAC/IP VLAN Tag + Type/ CRC) / (P Total Overhead)
* Line Rate % (in Mbps).
Data Rate: Payload / (P Total Overhead) * Line Rate %.
Utilization: % of Line Rate. For example, if we transmit 100Mbps on a 1Gbps interface then the utilization
value is 10% (or 100Mbps) of the total link capacity (or Line Rate).
Number of bytes
Pause Frames: Total number of transmitted and received ethernet pause flow-control frames.
BERT Results - Summary
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13.2.2.2 Errors
Errors tab: The following errors (Current and Total) are displayed:
Bits: Indicates errors related to test pattern (Bit Error or LSS [Pattern Loss)
BER: Bit Error Ratio
Symbol:
Declared when an invalid code-group in the transmission code is detected
FCS/CRC: Number of received frames with an invalid FCS
IP Checksum (Layer 3 only)
Jabber frames: Number of received frames larger than 1518 bytes containing an invalid FCS
Runt frames:
Number of received frames smaller than 64 bytes containing an invalid FCS
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