Au-Lop - Cisco NCS 2000 series Troubleshooting Manual

AU-LOP

AU-LOP
Default Severity: Critical (CR), Service-Affecting (SA)
Logical Objects: VCMON-HP, VCTRM-HP
An AU-LOP alarm indicates that the SDH high order path overhead section of the administration unit has
detected a loss of path. AU-LOP occurs when there is a mismatch between the expected and provisioned
circuit size. For the TXP card, an AU-LOP is raised if a port is configured for an SDH signal but receives a
SDH signal instead. (This information is contained in the H1 byte bits 5 and 6.)
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
Clear the AU-LOP Alarm
SUMMARY STEPS
1. In node view, click the Circuits tab and view the alarmed circuit.
2. Verify that the correct circuit size is listed in the Size column. If the size is different from what is expected,
such as a VC4-4c instead of a VC4, this causes the alarm.
3. If you have been monitoring the circuit with optical test equipment, a mismatch between the provisioned
circuit size and the size expected by the test set can cause this alarm. Ensure that the test set monitoring
is set up for the same size as the circuit provisioning. For specific procedures to use the test set equipment,
consult the manufacturer.
4. If you have not been using a test set, or if the test set is correctly set up, the error is in the provisioned
CTC circuit size. Complete the
5. Recreate the circuit for the correct size.
DETAILED STEPS
Step 1 In node view, click the Circuits tab and view the alarmed circuit.
Step 2
Verify that the correct circuit size is listed in the Size column. If the size is different from what is expected, such as a
VC4-4c instead of a VC4, this causes the alarm.
Step 3
If you have been monitoring the circuit with optical test equipment, a mismatch between the provisioned circuit size and
the size expected by the test set can cause this alarm. Ensure that the test set monitoring is set up for the same size as the
circuit provisioning. For specific procedures to use the test set equipment, consult the manufacturer.
Cisco NCS 2000 series Troubleshooting Guide, Release 11.0
130
Delete a Circuit, on page 454
Alarm Troubleshooting
procedure.