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Cisco ONS 15310-MA SDH Troubleshooting Guide, Release 9.0
78-18663-01
Chapter 2 Alarm Troubleshooting
Alarm Procedures
Clear the LO-TXPOWER Alarm
Step 1 Display the reporting card’s card view.
Step 2 Click the Provisioning > Optical > Optics Thresholds tabs.
Step 3 Increase the TX Power Low column value by 1%.
Step 4 If the card transmit power setting cannot be increased without affecting the signal, complete the
“Physically Replace a Card” procedure on page 2-153.
Caution Removing a card that currently carries traffic on one or more ports can cause a traffic hit. To avoid this,
perform an external switch if a switch has not already occurred. See the “2.9.1 Protection Switching,
Lock Initiation, and Clearing” section on page 2-146 for commonly used traffic-switching procedures.
Caution Always use the supplied electrostatic discharge wristband when working with a powered
ONS 15310-MA SDH.
Note When you replace a card with the identical type of card, you do not need to make any changes
to the database.
Step 5 If no ports are shown bad and the alarm does not clear, log into the Technical Support Website at
http://www.cisco.com/cisco/web/support/index.html for more information or call Cisco TAC
(1-800-553-2447).
2.7.140 LPBKCRS
Default Severity: Not Alarmed (NA), Non-Service-Affecting (NSA)
SDH Logical Objects: VCMON-HP, VCTRM-HP
The Cross-Connect Loopback condition indicates that there is a software cross-connect loopback active
between two STM1 or STM4 optical ports. A cross-connect loopback test occurs below line speed and
does not affect traffic.
For more information on loopbacks, see the “1.2 Identify Points of Failure on an Electrical Circuit Path”
section on page 1-4.
Note Cross-connect loopbacks occur below line speed. They do not affect traffic.
Clear the LPBKCRS Condition
Step 1 To remove the cross-connect loopback condition, double-click the ONS 15310-MA SDH in CTC to
display the card view.
Step 2 Complete the “Clear an STM-N Port XC Loopback Circuit” procedure on page 2-155.
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