Apsmm - Cisco NCS 2000 series Troubleshooting Manual

Alarm Troubleshooting
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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
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
Step 1, on page
Step 5 Click Apply.
Step 1, on page
125. If not, change it to match.
http://www.cisco.com/c/en/us/support/index.html
125. If not, change it to match.
Cisco NCS 2000 series Troubleshooting Guide, Release 11.0
APSMM
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