Failtoswr - Cisco ONS 15327 User Documentation

Alarm Procedures
Note
Step 13 Login to http://www.cisco.com/TAC for more information or call the Cisco Technical Assistance Center
to report a service-affecting problem (1-800-553-2447).

14.4.44 FAILTOSWR

•
This fail to switch ring signals an automatic protection switching (APS) ring switch failure
(FAILTOSWR) alarm clears when one of the following actions occurs: a higher priority event, such as a
user-switch command occurs, the next ring switch succeeds, or the cause of the APS switch (such as an
SF or SD alarm) clears.
Warning Invisible laser radiation may 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 may
pose an eye hazard. Use of controls or adjustments or performance of procedures other than those
specified may result in hazardous radiation exposure.
Procedure: Clear the FAILTOSWR on a Four-Fiber BLSR Configuration
Check to see that every node expected to be part of the ring is listed in the ring map:
Step 1
a.
b.
c.
d.
Display the CTC network view.
Step 2
Look for alarms on OC-N cards that make up the ring or span and troubleshoot these alarms.
Step 3
Login to the near-end node and click the Ring > Provisioning tabs.
Step 4
Record the OC-N cards listed under West Line and East Line. Ensure that these OC-N cards are active
Step 5
and in service.
Verify fiber continuity to the ports on the recorded cards.
Step 6
Verify that the correct port is in service.
Step 7
Caution
Use an optical test set to verify that a valid signal exists on the line.
Step 8
Test the line as close to the receiving card as possible.
Cisco ONS 15327 User Documentation, R3.3
14-38
When you replace a card with an identical type of card, you do not need to make any changes to
the database.
Not Alarmed (NA) (Condition)
Click the Provisioning > Ring tabs.
Highlight the row of the affected ring.
Click Ring Map.
Verify that a node ID appears in the Ring map for every node expected to be part of the ring.
Using a test set disrupts service on the optical card. It may be necessary to manually switch
traffic carrying circuits over to a protection path.
Chapter 14 Alarm Troubleshooting
June 2002