Viewing Sonet Line-Layer Information - ADC CUDA 3 Administration Manual

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HAPTER ACKET

Viewing SONET Line-Layer Information

O SONET A
VER DMINISTRATION
The SONET Line layer serves as the path between multiplexers and is
responsible for synchronizing data transmission and multiplexing the STS-n
signals generated by the section layer.
Performance management statistics are collected at the SONET line layer. To
view these Line-layer statistics, perform the following task within root mode:
Task
View SONET Line information.
The show controllers pos command includes a variety of information. The
following example displays Line-layer statistics by piping the output to
include only Line statistics:
To restart the statistics counters to zero, issue the clear counters command
within POS interface configuration mode.
Table 7-2 SONET Line Layer Statistics
Display Element
AIS — Path Alarm Indication Signal
Detections (PAIS)
RDI — Path Remote Defect
Indication Detections (PRDI)
FEBE (M1)
Command
show controllers pos <c/s/i> | include Line
Description
The number of times a Path Alarm
Indication Signal has been detected. A
PAIS occurs if all the H1/H2 pointer bytes
in the received SONET frame are 01.
The number of times a Path Remote
Defect Indication has been detected. A
PRDI occurs if bits 5,6 and 7 of the G1
byte received with the same value for 5
consecutive frames.
Far end block errors - Indicates the
number of B2 errors that were detected
by the remote side in its receive signal.
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