7.1.1.5 Starting/Stopping a BERT
Once all the necessary configurations have been completed, user can start the test by selecting Start from the top right corner
action pull down menu (green arrow pointing down). Once selected, the test will start immediately and the icon will change to a
Stop indication. To stop the test, simply tap the Stop icon. If testing on any of the fiber ports, ensure the LASER is switched ON
before starting the test.
BERT Start
7.1.2 BERT Results
7.1.2.1 Summary
Summary tab:
The following results including the Start (ST) and Elapsed (ET) times are displayed;
Line rate
Framed rate
Data rate
Utilization
Number of bytes
Optical power - optical level measured by the SFP or XFP transceiver
7.1.2.2 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.
Giant frames - number of received frames larger than 1522 bytes containing an invalid FCS.
MX100/120 e-Manual D07-00-004 Rev A04
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