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12.6 Subtending Rings
Figure 12-28
Node 4
Slot 13
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
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.
Nodes in different BLSRs can have the same, or different node IDs.
Note
Figure 12-29
BLSR Subtending from a BLSR
Slot 5
West
Slot 12
East
Node 2
Slot 5
West
Slot 12
East
Cisco ONS 15454 Reference Manual, R8.5
12-30
Path Protection Subtending from a BLSR
Slot 6
Slot 13
Slot 6
Node 3
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
Slot 5
Slot 12
BLSR
Slot 5
Slot 12
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
Chapter 12
SONET Topologies and Upgrades
Node 1
Slot 12
Slot 5
Node 2
Slot 6
West
Node 6
Slot 13
East
78-18106-01
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