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ADC Telecommunications, Inc.
126 C
HAPTER 7: PACKET OVER SONET ADMINISTRATION
Viewing SONET Line-Layer Information
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:
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
Task Command
View SONET Line information. show controllers pos <c/s/i> | include Line
cli:172.16.19.10:root# show controllers pos 1/3/1 | include Line
Line: AIS 0
Line: RDI 0
Line: FEBE(M1) 0
Line: BIP(B2) 0
cli:172.16.19.10:root#
Display Element Description
AIS — Path Alarm Indication Signal
Detections (PAIS)
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.
RDI — Path Remote Defect
Indication Detections (PRDI)
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.
FEBE (M1) Far end block errors - Indicates the
number of B2 errors that were detected
by the remote side in its receive signal.