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Configuration Options
C-73160-A2-GB21-50 January 1997
Table C-2
(4 of 5)
Port Configuration Options
Err Rate: 10E-4
Next 10E-4 10E-5 10E-6 10E-7 10E-8 10E-9 Prev
Port Excessive Error Rate Threshold. Sets the error rate threshold that determines when an Excessive Error Rate (EER)
condition is declared for a particular port. The error rate selected by this configuration option is determined by the ratio of
the number of CRC5 errors to the total number of bits received over a set period of time.
10E-4 – 10E-4 Threshold. For example, at 1536 kbps, EER is declared if more than 1,535 CRC5 errors are detected in a
10-second period. It is cleared with less than 1,536 errors in ten seconds.
10E-5 – 10E-5 Threshold. For example, at 1536 kbps, EER is declared if more than 921 CRC5 errors are detected in a
60-second period. It is cleared with less than 922 errors in sixty seconds.
10E-6 – 10E-6 Threshold. For example, at 1536 kbps, EER is declared if more than 92 CRC5 errors are detected in a
60-second period.
It is cleared with less than 93 errors in sixty seconds.
10E-7 – 10E-7 Threshold. For example, at 1536 kbps, EER is declared if more than 9 CRC5 errors are detected in a
60-second period. It is cleared with less than 10 errors in sixty seconds.
10E-8 – 10E-8 Threshold. For example, at 1536 kbps, EER is declared if more than 41 CRC5 errors are detected in three
15-minute intervals. It is cleared with less than 42 errors in three 15-minute intervals.
10E-9 – 10E-9 Threshold. For example, at 1536 kbps, EER is declared if more than 4 CRC5 errors are detected in three
15-minute intervals. It is cleared with less than 5 errors in three 15-minute intervals.
NOTE: This configuration option is only available on 2-port and 4-port DSU/CSUs.
NOTE: This configuration option is not available if EDL is disabled.
Near-end: Disab
Next Disab Maint Send Both Prev
Near-End Performance Statistics. Specifies whether the DSU/CSU maintains near-end performance statistics and sends
performance report messages (PRMs) for a particular port.
Disab – Disables near-end performance statistics and does not send PRMs.
Maint – Maintains near-end performance statistics for this port.
Send – Sends PRMs over the port’s EDL every second. Each PRM contains the performance statistics for the previous
4 seconds.
Both – Maintains near-end performance statistics and sends PRMs over the port’s EDL.
NOTE: This configuration option is only available on 2-port and 4-port DSU/CSUs.
NOTE: This configuration option is not available if EDL is disabled.
NOTE: If the local DSU/CSU is configured to send near-end performance statistics, then the remote device must be
configured to maintain far-end performance statistics.