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Cisco ONS 15454 Troubleshooting Guide, R8.5
November 2009
Chapter 2 Alarm Troubleshooting
2.7.105 FAILTOSWS
Step 13 If the condition does not clear after you replace the BLSR cards on the node one by one, repeat
Steps 4 through 12 for each of the nodes in the ring.
Step 14 If the condition does not clear, log into the Technical Support Website at
http://www.cisco.com/techsupport for more information or call Cisco TAC 1 800 553-2447.
2.7.105 FAILTOSWS
Default Severity: Not Alarmed (NA), Non-Service-Affecting (NSA)
SONET Logical Object: OCN
The Failure to Switch to Protection Span condition signals an APS span switch failure. For a four-fiber
BLSR, a failed span switch initiates a ring switch. If the ring switch occurs, the FAILTOSWS condition
does not appear. If the ring switch does not occur, the FAILTOSWS condition appears. FAILTOSWS
clears when one of the following situations occurs:
• A physical card pull of the active TCC2/TCC2P done under Cisco TAC supervision.
• A node power cycle.
• A higher-priority event such as an external switch command occurs.
• The next span switch succeeds.
• The cause of the APS switch (such as the “SD-L” condition on page 2-220 or the “SF-L” condition
on page 2-223) clears.
Clear the FAILTOSWS Condition
Step 1 Perform the Exercise Span command on the reporting card:
a. Click the Maintenance > BLSR tabs.
b. Determine whether the card you would like to exercise is the west card or the east card.
c. Click the row of the affected span under the East Switch or West Switch column.
d. Select Exercise Span in the drop-down list.
Step 2 If the condition does not clear, from the view menu, choose Go to Network View.
Step 3 Look for alarms on OC-N cards that make up the ring or span and troubleshoot these alarms.
Step 4 If clearing other alarms does not clear the FAILTOSWS condition, log into the near-end node.
Step 5 Click the Maintenance > BLSR tabs.
Step 6 Record the OC-N cards listed under West Line and East Line. Ensure that these OC-N cards are active
and in service:
a. Verify the LED status: A green ACT/SBY LED indicates an active card. An amber ACT/SBY LED
indicates a standby card.
b. To determine whether the OC-N port is in service, double-click the card in CTC to open the card
view.
c. Click the Provisioning > Line tabs.
d. Verify that the Admin State column lists the port as IS.
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