Interpret Statistics - Cisco 678 Installation And Operation Manual

Chapter 3 Configuration Procedures for the Cisco 627
Step 1
Step 2
Step 3

Interpret Statistics

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To retrieve statistics:
To see a list of variables, enter:
cbos# stats
To display specific statistics, enter:
cbos# stats variable from list
To exit the CBOS, enter:
cbos# quit
Use the stats atm0 and show interface atm1 commands to retrieve key statistics
regarding ADSL performance. These statistics are:
CRC Errors—Number of CRC errors. CRC errors might occur when the ATM
•
traffic rate is faster than the ADSL rate, causing ATM cells to be dropped.
This corrupts the AAL5 logical packets. CRC errors might also be an
indication of excessive noise on the DSL line.
Errored Seconds—Number of Superframe CRC errors. If this field is
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incremented, the user data path is encountering uncorrected errors.
Rx'ed Blocks—Number of blocks received by the unit. A block is 250
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milliseconds. This statistic is reset whenever the modem trains.
Tx'ed Blocks—Number of blocks transmitted by the unit. A block is 250
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milliseconds. This statistic is reset whenever the modem trains.
Corrected/Uncorrected Blocks—The modem can correct a block containing
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errors. If the block correction fails, the block is counted as an uncorrected
block and discarded.
Attenuation—Difference in decibels (dB) between the power level received
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at the near end versus the power level transmitted from the far end. The
attenuation range is 0 to 63 dB in 1 db increments. Attenuation is calculated
every 10 seconds.
Cisco 600 Series Installation and Operation Guide
Interpret Statistics
3-21