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Cisco ONS 15310-CL and Cisco ONS 15310-MA Troubleshooting Guide, R7.0
Chapter 1 General Troubleshooting
1.10.3 AIS-V on Unused 15310-CL-CTX Card VT Circuits
1.10.3 AIS-V on Unused 15310-CL-CTX Card VT Circuits
Symptom An incomplete circuit path causes an alarm indications signal (AIS).
Table 1-22 describes the potential cause of the symptom and the solution.
Clear AIS-V on Unused Controller Card VT Circuits
Step 1 Determine the affected port.
Step 2 Record the node ID, slot number, port number, and VT number.
Step 3 Create a unidirectional VT circuit from the affected port back to itself, such as
Source node/Slot 2/Port 2/VT 13 cross connected to Source node/Slot 2/Port 2/VT 13.
Step 4 Uncheck the Bidirectional check box in the circuit creation window.
Step 5 Give the unidirectional VT circuit an easily recognizable name, such as DeleteMe.
Step 6 Display the controller card (15310-CL-CTX or CTX2500) in CTC card view. Click the Maintenance >
DS1 tabs.
Step 7 Locate the VT that is reporting the alarm (for example, DS3 #2, DS1 #13).
Step 8 From the Loopback Type list, choose Facility and click Apply.
Step 9 Click Circuits.
Step 10 Find the one-way circuit you created in Step 3. Select the circuit and click Delete.
Step 11 Click Yes in the Delete Confirmation dialog box.
Step 12 In node view, double-click the controller card (15310-CL-CTX or CTX2500). The card view appears.
Step 13 Click the Maintenance > DS1 tabs.
Step 14 Locate the VT in the Facility Loopback list.
Step 15 From the Loopback Type list, choose None and then click Apply.
Step 16 Click the Alarm tab and verify that the AIS-V alarms have cleared.
Step 17 Repeat this procedure for all the AIS-V alarms on the controller.
Table 1-22 AIS-V on Unused 15310-CL-CTX Card VT Circuits
Possible Problem Solution
The port on the
reporting node is
in-service but a node
upstream on the circuit
does not have an OC-N
port in service.
An AIS-V indicates that an upstream failure occurred at the VT layer. AIS-V
alarms also occur on VT circuits that are not carrying traffic and on stranded
bandwidth.
Perform the “Clear AIS-V on Unused Controller Card VT Circuits”
procedure on page 1-65.