Cisco ONS 15454 SDH Specifications download pdf (Page 203)

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Cisco ONS 15454 SDH Installation and Operations Guide, R3.3

May 2002

Chapter 5 SDH Topologies

Adding and Removing Nodes from an SNCP Ring

Caution Traffic is not protected during a protection switch.

Step 6 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.

b. Remove the west fiber connection from the node that will connect to the east port of the new node.

Step 7 Replace the removed fiber connections with connections from the new node.

Note Perform this step on site at the new node.

Step 8 Log out of CTC and then log back into the new node in the ring.

Step 9 Display the network view. The new node should appear in the network view. Wait for a few minutes to

allow all the nodes to appear.

Step 10 Click the Circuits tab and wait for all the circuits to appear, including spans. Circuits that will pass

through the new node display as “incomplete.”

Step 11 In the network view, right-click the new node and choose Update Circuits With New Node from the

list of options. Wait for the confirmation dialog box to appear. Verify that the number of updated circuits

displayed in the dialog box is correct.

Step 12 Click the Circuits tab and verify that no incomplete circuits are displayed. If incomplete circuits are

displayed, repeat Step 10.

Step 13 Use the “Switch SNCP Ring Traffic” procedure on page 5-10 to clear the protection switch.

Procedure: Remove an SNCP Node

Caution The following procedure is designed to minimize traffic outages while nodes are removed, but traffic

will be lost when you delete and recreate circuits that passed through the removed node.

Step 1 Start CTC for one of the SNCP ring nodes and display network view. Clear any alarms or conditions on

the ring nodes. See the “Check for Alarms” procedure on page 5-61.

Step 2 Complete the “Switch SNCP Ring Traffic” procedure on page 5-10 to initiate a FORCE switch to move

traffic away from the node you will remove. Initiate a FORCE switch on all spans connected to the node

you are removing.

Caution Traffic is not protected during a forced protection switch.

Step 3 Log into the node that you will remove if you are already logged in, display the node view.

Purpose This procedure explains how to remove SNCP nodes.

Prerequisite Procedures “Switch SNCP Ring Traffic” procedure on page 5-10

Onsite/Remote Perform these steps onsite and not from a remote location.

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Cisco ONS 15454 SDH Specifications Page 203