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Cisco ONS 15454 Installation and Operations Guide
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Chapter5 SONET Topologies
Unidirectional Path Switched Rings
Figure5-27 Switching UPSR circuits
Step 4 Click Apply.
Step 5 When the confirmation dialog box appears, click OK to confirm the protection switching. The co lumn
under Switch State changes to your chosen level of protection .
Step 6 Click Close after Switch State changes.
Procedure: Add a UPSR Node
Note You can add only one node at a time. Perform these steps onsite and not from a remote location.
Step 1 Log into CTC and display the UPSR nodes in network view. Verify the following:
•All UPSR spans on the network map are green.
•No critical or major alarms (LOF, LOS, ASP, ASL) are displayed on the Alarms tab.
•On the Conditions tab, no UPSR switches are active.
•At each physical UPSR node, all fibers are securely connected to the appropriate ports.
If trouble is indicated, for example, a critical or major alarm exists, resolve the problem before
proceeding.
Step 2 At the node that will be added to the UPSR:
•Verify that the OC-N cards are installed and fiber is available to connect to the other nodes.
•Run test traffic through the cards that will connect to the UPSR.
•Use the “Setting Up a UPSR” section on page 5-30 to pr ovision the new node .
Step 3 Log into a node that will directly connect to the new node.
Step 4 Use the “Switch UPSR Traffic” procedure on page5-3 2 to initiate a FORCE switch to switch traffic
away from the span that will connect to the new node.
Caution Traffic is not protected during a protection switch.
Step 5 Two nodes will connect directly to the new node; remove their fiber connections:
a. Remove the east fiber connection from the node that will connect to the west port of the new node.