Specifications

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Cisco MGX 8850 (PXM45) and MGX 8950 Software Configuration Guide
Release 3, Part Number 78-14788-01 Rev. C0, January 2004
Chapter 7 Switch Operating Procedures
Configuring a Bit Error Rate Test on an AXSM
In the following example, the user enables BERT on line 1 in the lower bay of the AXSM-E card in slot
11.
Unknown.11.AXSME.a > cnfbert -ln 2.1 -tp 3 -tpi 2 -rpi 2 -eir 8
Step 6 After the BERT has been running for at least 30 minutes, enter the dspbert <bay> command to display
the BERT result
Unknown.11.AXSME.a > dspbert <bay.line>.
Replace <bay> with the number “1” to indicate the upper bay, or “2” to indicate the lower bay. Replace
Table 7-46 cnfbert Command Parameters
Parameter Description
-ln Replace <bay> with the number “1” to indicate the upper bay, or “2” to indicate the
lower bay.
Replace <line> with the number of the line you are testing as follows:
• For OC12, enter the number “1.”
• For OC3, enter a number from “1” through “4.”
• For T1, enter the number “1.”
• For T3and E3, enter a number from “1” through “8.”
-tp Test pattern to be generated. Enter the appropriate number, from 1 to 32, to indicate
the appropriate patterns.
Note Enter the dspbert command to view all the possible test patterns.
-tpi Enter the number “2” to invert the transmit BERT pattern. Enter the number “1” to
ensure that the transmit BERT patter is not inverted.
-rpi Enter the number “2” to invert the transmit BERT pattern. Enter the number “1” to
ensure that the transmit BERT patter is not inverted.
-eir Injects errors into the transmitted pattern. Replace <error insertion rate> with a
number in the range 1-8:
• 1 = noError(1): No bit errors are inserted.
• 2 = oneInTen: Insert bit errors at the rate of 1 bit error per 10 bits(10-1)
transmitted.
• 3 = oneInHundred: Insert bit errors at the rate of 1 bit error per 100 bits(10-2)
transmitted.
• 4 = oneInThousand: Insert bit errors at the rate of 1 bit error per 1000
bits(10-3) transmitted.
• 5 = oneIn10Thousand: Insert bit errors at the rate of 1 bit error per 10000(10-4)
bits transmitted.
• 6 = oneInHundredThousand: Insert bit errors at the rate of 1 bit error per
100000 bits(10-5) transmitted.
• 7 = oneInMillion: Insert bit errors at the rate of 1 bit error per 1000000
bits(10-6) transmitted.
• 8 = oneInTenMillion: Insert bit errors at the rate of 1 bit error per
10,000,000(10-7)bits transmitted.