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Cisco ONS 15454 Reference Manual, R8.5.x
78-18106-01
Chapter 12 SONET Topologies and Upgrades
12.6 Subtending Rings
Figure 12-28 Path Protection Subtending from a BLSR
The ONS 15454 can support two BLSRs on the same node. This allows you to deploy an ONS 15454 in applications requiring SONET Digital Cross-connect Systems (DCSs) or multiple SONET add/drop multiplexers (ADMs). Figure 12-29 shows two BLSRs shared by one ONS 15454. Ring 1 runs on Nodes 1, 2, 3, and 4. Ring 2 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 Nodes in different BLSRs can have the same, or different node IDs.
Figure 12-29 BLSR Subtending from a BLSR
Node 3
Node 1
Node 2
BLSR
Node 4
55303
Slot 13
Slot 12
Slot 12
Slot 12
Slot 13
Slot 6 Slot 5
Slot 5
Slot 5
Slot 6
55298
Node 5
Slot 6
West
East
Slot 13
Node 7
Slot 13
East
Slot 6
West
Slot 6
West
Slot 13
East
Node 6
Node 1
Slot 5
West
Slot 5
West
Slot 12
East
Slot 12
East
Node 3
Slot 12
East
Slot 5
West
Node 2
Slot 5
West
Slot 12
East
Slot 13
East
Slot 6
West
Node 4
BLSR
Ring 1
BLSR
Ring 2