Figure 5-30 A Blsr Subtending From A Blsr - Cisco 15454-TCC - Network Processor Card Operation Manual

Chapter 5 SONET Topologies
c.
d.
Step 9 Use the
Step 10 Follow Steps 1– 8 for the other nodes that will be in the BLSR.
Step 11 Go to the network view to see the subtending ring.
The ONS 15454 can support two BLSRs on the same node. This capability allows you to deploy an ONS
15454 in applications requiring SONET DCSs (digital cross connect systems) or multiple SONET
ADMs (add/drop multiplexers).
Figure 5-30
runs on Nodes 4, 5, 6, and 7. Two BLSR rings, Ring 1 and Ring 2, are provisioned on Node 4. Ring 1
uses cards in Slots 5 and 12, and Ring 2 uses cards in Slots 6 and 13.
Note Although different node IDs are used for the two BLSRs shown in
BLSRs can use the same node ID.

Figure 5-30 A BLSR subtending from a BLSR

Slot 5
West
Slot 12
East
Node 2
Slot 5
West
Slot 12
East
After subtending two BLSRs, you can route circuits from nodes in one ring to nodes in the second ring.
For example in
travel from Node 1 to Node 4 to Node 7. If fiber breaks occur, for example between Nodes 1 and 4 and
Nodes 4 and 7, traffic is rerouted around each ring: in this example, Nodes 2 and 3 in Ring 1 and Nodes
5 and 6 in Ring 2.
November 2001
Click Apply.
Repeat steps a – c for the second BLSR trunk card.
"Provision the BLSR" procedure on page 5-14
shows two BLSRs shared by one ONS 15454. Ring 1 runs on Nodes 1, 2, 3, and 4. Ring 2
Node 1
Slot 12
East
Slot 5
West
BLSR
Ring 1
Slot 12
Node 4
East
Slot 5
West
Node 3
Figure 5-30, you can route a circuit from Node 1 to Node 7. The circuit would normally
to configure the BLSR.
Node 5
Slot 6 East
West Slot 13
Slot 13
East
BLSR
Ring 2
Slot 6
West
Slot 13 Slot 6
East West
Node 7
Cisco ONS 15454 Installation and Operations Guide
Subtending Rings
Figure 5-30, nodes in different
Slot 6
West
Node 6
Slot 13
East
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