Usage Guidelines
To use this command, you must be in a user group associated with a task group that includes appropriate task
IDs. If the user group assignment is preventing you from using a command, contact your AAA administrator
for assistance.
Reporting an alarm means that the alarm can be logged to the console, but it is no guarantee that it is logged.
SONET alarm hierarchy rules dictate that only the most severe alarm of an alarm group is reported. Whether
an alarm is reported or not, you can check the current state of masked alarm, a problem indication that is a
candidate for an alarm, by displaying the
“
Masked Alarms
”
line in the
show controllers sonet
command
output.
For B1, the bit interleaved parity (BIP) error report is calculated by comparing the BIP-8 code with the BIP-8
code that is extracted from the B1 byte of the following frame. Differences indicate that section-level bit errors
have occurred.
For B2, the BIP error report is calculated by comparing the BIP-8/24 code with the BIP-8 code that is extracted
from the B2 byte of the following frame. Differences indicate that line-level bit errors have occurred.
Path AIS is sent by line terminating equipment to alert the downstream path terminating equipment (PTE)
that it has detected a defect on its incoming line signal.
Path loss of pointer (LOP) is reported as a result of an invalid pointer (H1, H2) or an excess number of new
data flag enabled indications.
SLOF is detected when an error-framing defect on the incoming SONET signal persists for 3 microseconds.
SLOS is detected when an all-zeros pattern on the incoming SONET signal is observed. This defect might
also be reported if the received signal level drops below the specified threshold.
To determine the alarms that are reported on the controller, use the
show controllers sonet
command.
Task ID
Operations
Task ID
read, write
sonet-sdh
Examples
The following example shows how to enable the reporting of line AIS alarms on the path controller:
RP/0/RSP0/CPU0:router(config)#
controller sonet 0/1/0/1
RP/0/RSP0/CPU0:router(config-sonet)#
report lais
Related Commands
Description
Command
Displays information about the operational status of SONET
layers.
show controllers sonet, on page 906
Cisco ASR 9000 Series Aggregation Services Router Interface and Hardware Component Command Reference,
Release 5.3.x
887
SONET Controller Commands on the Cisco ASR 9000 Series Router
report (SONET)