Cisco ONS 15454 Troubleshooting Manual page 180
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1.11.2 AIS-V on DS3XM-6 or DS3XM-12 Unused VT Circuits
1.11.2 AIS-V on DS3XM-6 or DS3XM-12 Unused VT Circuits
Symptom
Clear AIS-V on DS3XM-6 or DS3XM-12 Unused VT Circuits
Determine the affected port.
Step 1
Record the node ID, slot number, port number, or VT number.
Step 2
Create a unidirectional VT circuit from the affected port back to itself, such as
Step 3
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.
Give the unidirectional VT circuit an easily recognizable name, such as delete me.
Step 5
Open the DS3XM-6 card in CTC card view. Click the Maintenance > DS1 tabs.
Step 6
Locate the VT that is reporting the alarm (for example, DS3 #2, DS1 #13).
Step 7
From the Loopback Type list, choose Facility and click Apply.
Step 8
Click Circuits.
Step 9
Find the one-way circuit you created in
Step 10
check boxes.
Click Yes in the Delete Confirmation dialog box.
Step 11
Open the DS3XM-6 or DS3XM-12 card in CTC card view. Click Maintenance > DS1 tabs.
Step 12
Locate the VT in Facility Loopback.
Step 13
Step 14
From the Loopback Type list, choose None and then click Apply.
Click the Alarms tab and verify that the AIS-V alarms have cleared.
Step 15
Repeat this procedure for all the AIS-V alarms on the DS3XM-6 or DS3XM-12 cards.
Step 16
Cisco ONS 15454 Troubleshooting Guide, R8.5
1-136
An incomplete circuit path causes an AIS.
Possible Cause
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 virtual tributary
Recommended Action
(VT) layer. AIS-V alarms also occur on DS3XM-6 and DS3XM-12 VT circuits that are not carrying
traffic and on stranded bandwidth. Complete the
VT Circuits" procedure on page
"Clear AIS-V on DS3XM-6 or DS3XM-12 Unused
1-136.
Step
3. Select the circuit and click Delete. Do not check any
Chapter 1
General Troubleshooting
November 2009
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