Cisco ONS 15454 Series Multiservice Provisioning Platforms

Field Notice: Proper Procedure for Adding a Node to a UPSR

July 20, 2000

Products Affected



Cisco ONS 15454

Formerly Cerent 454

Problem Description

The addition of more than one ONS 15454 node at a time to a UPSR may cause circuits in the UPSR to be uprotected. During a ring switch these circuits may drop as a result.


This problem was identified in the field and has been verified in the Cisco Systems Technical Assistance Center (TAC) lab.

Problem Symptoms

After the nodes are added and the "Update Circuits with new node" procedure is executed at the new nodes some circuits may not show a protection path (spans) in the circuits list.


The addition of more than one ONS15454 node at a time into a UPSR is not currently supported. If more than one node is added simultaneously there are two workarounds in order to make sure the circuits are protected.

  1. Remove all of the newly added nodes using the "Procedure to Drop a Node from a UPSR" included in the User Documentation.

    Perform the "Procedure to Add a node to a UPSR" adding only one node at a time. Finish the procedure for the new node and then add each subsequent node (following the same procedure for every node) until all nodes have been added to the UPSR.

  2. Delete and re-create ALL circuits, one at a time.

The correct procedure for adding or dropping a node to a UPSR is also documented in the ONS 15454 User Documentation, (Section 5.2.4 starting on page 5-25).

For More Information

If you require further assistance, or if you have any further questions regarding this field notice, please contact the Cisco Systems Technical Assistance Center (TAC) by one of the following methods: