R3303-HP HSR6800 Routers Interface Command Reference

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• The level-3 keyword specifies generating an LFA alarm when two of six frame alignment bits are
lost.
• The level-4 keyword applies only to ESF frames. It specifies generating an LFA alarm when errors
are detected in four consecutive ESF frames.
Level-1 LFA alarm threshold applies.
los: Sets a loss of signal (LOS) alarm threshold, which can be pulse-detection (for the pulse detection
duration threshold with LOS) and pulse-recovery (for the pulse threshold with LOS).
The threshold of pulse-detection, in units of pulse intervals, is in the range of 16 to 4,096 and defaults to
176.
The threshold of pulse-recovery is in the range of 1 to 256 and defaults to 22.
If the number of the pulses detected during the total length of the specified pulse detection intervals is
smaller than the pulse-recovery threshold, a LOS alarm occurs. For example, if the two thresholds take
their defaults, a LOS alarm is created if the number of pulses detected within 176 pulse intervals is less
than 22.
Examples
# Set the number of detection intervals to 300 for the pulse detection duration threshold.
<Sysname> system-view
[Sysname] controller t1 2/0/0
[Sysname-T1 2/0/0] alarm-threshold los pulse-detection 300
bert (CT1 interface)
Use bert to start a BERT test on a CT1 interface.
Use undo bert to stop the BERT test running on the CT1 interface.
Syntax
bert pattern { 2^15 | 2^20 } time minutes [ unframed ]
undo bert
Default
No BERT test is performed.
Views
CT1 interface view
Default command level
2: System level
Parameters
pattern: Sets a bit error rate test (BERT) pattern, which could be 2^15 or 2^20.
2^15: Specifies the length of transmitted BERT pattern, in bits, as two to the fifteenth power.
2^20: Specifies the length of transmitted BERT pattern, in bits, as two to the twentieth power
time minutes: Sets the duration (in minutes) of a BERT test. The minutes argument is in the range of 1 to
1,440.
unframed: Sets the test pattern to cover the overhead bits of the frame.