User guide

Packet Over SONET Module Installation and User Guide 3-95
Configuring and Monitoring APS Functions
Displaying APS Group Status Information
To display APS group status information, use the following command:
show aps {<group#>} {detail}
The optional group# parameter is an integer in the range from 1 to 65535 that identifies
a particular APS group for which status is to be shown.
If you enter the
show aps command without an argument or keyword, the command
displays a summary of status information for all configured APS groups. You can use
the
detail keyword to display more detailed status information.
Summary status includes the following information for each APS group:
• Provisioned values of all APS configuration parameters, including SONET port
numbers and whether the ports are performing the working or protection line
function.
• An indication of whether the line associated with each configured port is active or
inactive from an APS perspective, along with a timestamp indicating when the last
APS state change occurred.
• An indication of whether an error condition currently exists on the line associated
with each configured port, along with a timestamp indicating when the last error
occurred (errors include Signal Fail and Signal Degrade Events).
• An indication of whether a Signal Fail (SF) or Signal Degrade (SD) Event due to an
excessive Bit Error Rate (BER) currently exists on the line associated with each
configured port. The BER thresholds that cause SF and SD Events can be specified as
part of configuring a SONET port.
• Counts of the number of SF and SD Events initiated by each configured port due to
an excessive BER.
• A count of the number of APS Authentication Failures, which is a count of the
number of received APS control packets that have been discarded due to
authentication failures.
Detailed status includes the information reported in the summary status along with
additional status and management counters. Detailed status only applies to ports
performing the protection line function.