Troubleshooting Guide

In this document, it is assumed that the new node is racked and powered up with all of its cards installed and
their provisioning completed. Provisioning includes:
General•
Network•
Timing•
SONET Data Communications Channels (SDCCs)•
Place the optical ports in service•
References for the previous tasks can be found in the Setting Up a UPSR section of the Cisco ONS 15454
Procedure Guide, Release 3.4. Be sure to run test traffic through the new node in order to verify that all
hardware is operational. Do this prior to the start of the procedure. You should also identify and tag all fibers
involved before you begin.
Note: You can only add one node to a UPSR at a time.
Caution: The procedures to add a node and remove a node are service−affecting and should be
performed during a maintenance window due to the protection switching involved. Disruptions of traffic up to
three minutes are possible for any Ethernet traffic due to Spanning Tree re−convergence. All other traffic
endures up to a 50 ms hit. In addition, the procedure to remove a node causes each circuit that changed
Synchronous Transport Signal (STS) or Virtual Tributary (VT) while it passes through the removed node in
order to incur an outage for the length of time that it takes to delete and rebuild. This depends on operator
proficiency with Cisco Transport Controller (CTC).
Conventions
Refer to Cisco Technical Tips Conventions for more information on document conventions.
How to Add a Node to the UPSR
This procedure involves you to:
Check circuit integrity.•
Initiate a forced protection switch.•
Connect fibers to the new node.•
Re−launch CTC.•
Update circuits.•