Adding And Removing Blsr Nodes; Procedure: Add A Blsr Node; Figure 5-15 A Three-Node Blsr Before Adding A New Node - Cisco 15454-TCC - Network Processor Card Operation Manual

Bidirectional Line Switched Rings

5.2.7 Adding and Removing BLSR Nodes

This section explains how to add and remove BLSR nodes. To add or remove a node, you force a
protection switch to route traffic away from the span where you will add or remove the node.
shows a three-node BLSR before the new node is added. To add Node 3, you would:
•
•
•
You can only add one node at a time to an ONS 15454 BLSR.
Note

Figure 5-15 A three-node BLSR before adding a new node

West
West

Procedure: Add a BLSR Node

Perform these steps on-site and not from a remote location.
Draw a diagram, similar to
Step 1
diagram, identify the nodes, cards (slots) and spans (east or west) that will connect to the new node. This
information is essential to complete this procedure without error. For example, in
would circle Slot 5 (west) on Node 1, and Slot 12 (east) on Node 4.
Cisco ONS 15454 Installation and Operations Guide
5-18
Force a protection switch on the Node 1 (Slot 5, West) and Node 4 (Slot 12, East) span. The
protection switch forces traffic away from the fibers that you will remove and reconnect to the added
node.
Remove fibers from Node 1/Slot 5 and Node 4/Slot 12, then, using additional fibers, connect Node
1 and Node 4 to Node 3.
Remove the protection switch to route traffic through the added node.
Tx Tx
Rx Rx
Slot 5 Slot 12
Node 1
Tx Tx
Rx Rx
Slot 5 Slot 12
Node 3
Figure
East West
Slot 5
Tx
Rx
East West
Slot 5
5-15, for the BLSR installation where you will add the node. In the
Chapter 5 SONET Topologies
Tx Tx
Rx Rx
East
Slot 12
Node 2
Tx
Rx
East
Slot 12
Node 4
Figure
Figure 5-15
5-15, you
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