Cisco ONS 15454 Troubleshooting Manual page 239

Chapter 2 Alarm Troubleshooting
An APS Mode Mismatch failure alarm occurs on OC-N cards when there is a mismatch of the protection
switching schemes at the two ends of the span, such as being bidirectional at one end and unidirectional
at the other. Each end of a span must be provisioned the same way: bidirectional and bidirectional, or
unidirectional and unidirectional. APSMM can also occur if third-party equipment is provisioned as 1:N
and the ONS 15454 is provisioned as 1+1.
If one end is provisioned for 1+1 protection switching and the other is provisioned for path protection
protection switching, an APSMM alarm occurs in the ONS 15454 that is provisioned for 1+1 protection
switching.
Clear the APSMM Alarm
Step 1 For the reporting ONS 15454, display node view and verify the protection scheme provisioning:
a.
b.
c.
d.
Click OK in the Edit Protection Group dialog box.
Step 2
Log into the far-end node and verify that the OC-N 1+1 protection group is provisioned.
Step 3
Verify that the Bidirectional Switching check box matches the checked or unchecked condition of the
Step 4
box recorded in
Click Apply.
Step 5
If the alarm does not clear, log into the Technical Support Website at http://www.cisco.com/techsupport
Step 6
for more information or call Cisco TAC 1 800 553-2447.
2.7.21 APS-PRIM-FAC
The Optimized 1+1 APS Invalid Primary Section condition occurs on OC-N cards in an optimized 1+1
protection system if there is an APS status switch between the primary and secondary facilities to
identify which port is primary.
APS-PRIM-FAC is an informational condition and does not require troubleshooting. If the APS switch
Note
is related to other alarms, troubleshoot these alarms as necessary using the procedures in this chapter.
Clear the APS-PRIM-FAC Condition
This condition clears when the card receives a valid primary section indication (1 or 2).
Step 1
November 2009
Click the Provisioning > Protection tabs.
Click the 1+1 protection group configured for the OC-N cards.
The chosen protection group is the protection group optically connected (with data communications
channel, or DCC, connectivity) to the far end.
Click Edit.
Record whether the Bidirectional Switching check box is checked.
Step 1. If not, change it to match.
Default Severity: Not Alarmed (NA), Non-Service Affecting (NSA)
SONET Logical Object: OCN
Cisco ONS 15454 Troubleshooting Guide, R8.5
2.7.21 APS-PRIM-FAC
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