If the condition does not clear, log into the Technical Support Website at
http://www.cisco.com/c/en/us/support/index.html
for more information or call Cisco TAC (1 800 553-2447).
APSMM
Default Severity: Minor (MN), Non-Service-Affecting (NSA)
SONET Logical Object: STMN
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 NCS 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 NCS that is provisioned for 1+1 protection switching.
Clear the APSMM Alarm
SUMMARY STEPS
1.
For the reporting NCS, display node view and verify the protection scheme provisioning:
2.
Click
OK
in the Edit Protection Group dialog box.
3.
Log into the far-end node and verify that the OC-N 1+1 protection group is provisioned.
4.
Verify that the Bidirectional Switching check box matches the checked or unchecked condition of the
box recorded in
. If not, change it to match.
5.
Click
Apply.
DETAILED STEPS
Step 1
For the reporting NCS, display node view and verify the protection scheme provisioning:
a) Click the
Provisioning
>
Protection
tabs.
b) 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.
c) Click
Edit
.
d) Record whether the Bidirectional Switching check box is checked.
Step 2
Click
OK
in the Edit Protection Group dialog box.
Step 3
Log into the far-end node and verify that the OC-N 1+1 protection group is provisioned.
Step 4
Verify that the Bidirectional Switching check box matches the checked or unchecked condition of the box recorded in
. If not, change it to match.
Step 5
Click
Apply.
Cisco NCS 2000 series Troubleshooting Guide, Release 11.0
125
Alarm Troubleshooting
APSMM