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Cisco ONS 15454 Troubleshooting Guide, R8.5
November 2009
Chapter 2 Alarm Troubleshooting
2.7.104 FAILTOSWR
page 2-220, the “LOF (OCN)” alarm on page 2-151, the “LOS (OCN)” alarm on page 2-164, the “SD-L”
condition on page 2-220, or the “SF-L” condition on page 2-223 are also occurring on the reporting port,
complete the applicable alarm clearing procedure.
Note A higher-priority alarm is an alarm raised on the working electrical card using the 1:N card
protection group. The working DS-N card is reporting an alarm but not reporting a FAILTOSW
condition.
Step 2 If the condition does not clear, replace the active OC-N card that is reporting the higher-priority alarm.
Complete the “Physically Replace a Traffic Card” procedure on page 2-273. Replacing the active OC-N
card that is reporting the higher-priority alarm allows traffic to revert to the active slot. Reverting frees
the standby card, which can then take over traffic from the card reporting the lower-priority alarm and
the FAILTOSW-PATH condition.
Step 3 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.
2.7.104 FAILTOSWR
Default Severity: Not Alarmed (NA), Non-Service-Affecting (NSA)
SONET Logical Object: OCN
The Fail to Switch to Protection Ring condition occurs when a ring switch did not complete because of
internal APS problems.
FAILTOSWR clears in any of the following situations:
• 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.
• The next ring 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.
Warning
On the OC-192 card, the laser is on when the card is booted and the safety key is in the on position
(labeled 1). The port does not have to be in service for the laser to be on. The laser is off when the
safety key is off (labeled 0).
Statement 293
Warning
Invisible laser radiation could be emitted from the end of the unterminated fiber cable or connector.
Do not stare into the beam directly with optical instruments. Viewing the laser output with certain
optical instruments (for example, eye loupes, magnifiers, and microscopes) within a distance of
100 mm could pose an eye hazard.
Statement 1056
Warning
Use of controls, adjustments, or performing procedures other than those specified could result in
hazardous radiation exposure.
Statement 1057
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