Cisco ONS 15454 SDH Specifications download pdf (Page 54)

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Cisco ONS 15454 SDH Troubleshooting and Maintenance Guide, R3.3

May 2002

Chapter 1 Alarm Troubleshooting

Alarm Procedures

Procedure: Clear the EQPT-MISS Alarm

Step 1 If the alarm is reported against the fan object, check that the fan-tray assembly is present.

Step 2 If no fan-tray assembly is present, use the retractable handles embedded in the front of the fan tray to

pull the fan-tray assembly forward several inches, push the fan-tray assembly firmly back into the

ONS 15454 SDH shelf assembly, and close the retractable handles.

Step 3 If no fan-tray assembly is present, obtain a fan-tray assembly and refer to the fan-tray assembly

installation information in the Cisco ONS 15454 SDH Installation and Operations Guide.

1.5.29 E-W-MISMATCH

• Major, Service-affecting

A procedural error misconnect East/West direction alarm occurs when nodes in a ring have an East

slot/port misconnected to another East slot/port or a West slot/port misconnected to another West

slot/port. In most cases, the user did not connect the fiber cables correctly, or the ring provisioning plan

was flawed. You can physically reconnect the fiber cable to the correct slot/ports to clear the

E-W-MISMATCH alarm. Alternately, you can delete and recreate the span in CTC to change the West

line and East line designations. The CTC method will clear the alarm, but may change the traditional

East-West node connection pattern of the ring.

Note The E-W-MISMATCH alarm also appears during the initial set up of a ring with its East-West slot/ports

configured correctly. In this instance, the alarm clears itself shortly after the ring setup is complete.

Note The lower-numbered slot on a node is traditionally labeled as the West slot and the higher numbered slot

is labeled as the East slot. For example, Slot 6 is West and Slot 12 is East.

Procedure: Clear the E-W-MISMATCH Alarm with a Physical Switch

Step 1 Diagram the ring setup, including nodes and spans, on a piece of paper or white board.

Step 2 Display the CTC network view and label each of the nodes on the diagram with the same name that

appears on the screen network map.

Step 3 Double-click each span to reveal the node name and slot/port for each end of the span.

Step 4 Label the span ends on the diagram with the same information. For example, with Node 1/Slot12/Port1

- Node2/Slot6/Port1, label the end of the span that connects Node 1 and Node 2 at the Node 1 end as Slot

12/Port 1. Label the Node 2 end of that same span Slot 6/ Port 1.

Step 5 Repeat Steps 3 and 4 for each span on your diagram.

Step 6 Label the highest-numbered slot at each node East and the lowest-numbered slot at each node West.

Step 7 Look at the diagram. You should see a clockwise pattern of West slots connecting to East slots for each

span.

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Cisco ONS 15454 SDH Specifications Page 54