Configuring T1 CRC Error Minor Alarm Thresholds
Junos OS collects CRC errors from PICs every second. On Channelized OC3 IQ and IQE PICs, Channelized OC12 IQ and IQE PICs, and Channelized T3 IQ PICs, you can configure minor error thresholds for T1 CRC errors.
When the threshold is exceeded for 1 second, a defect condition is declared. If the defect condition continues for the monitoring period, an alarm condition is declared. You can display the CRC error threshold configuration, CRC errors count, and the alarm condition using the show interfaces extensive command.
To configure a CRC minor error threshold, include the crc-minor-alarm-threshold statement at the [edit interfaces interface-name t1-options] hierarchy level, specifying the errors per bits as 1e-3, 5e-4, 1e-4, 5e-5, 1e-5, 5e-6, or 1e-6:
To configure a T1 CRC error minor alarm for five errors in 10–4 bits, include the crc-minor-alarm-threshold statement at the [edit interfaces interface-name t1-options] hierarchy level, specifying the 5e-4 option:
The 10-second monitoring period is used for values 1e-3, 5e-4, 1e-4, and 5e-5. The 1e-5 value uses a 50-second monitoring period. The 5e-6 value uses a 100-second monitoring period. The 1e-6 value uses a 500-second monitoring period.
