Cisco ONS 15454 SDH Specifications Page 238

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5-48
Cisco ONS 15454 SDH Installation and Operations Guide, R3.3
May 2002
Chapter 5 SDH Topologies
Subtending Rings
Figure 5-36 An SNCP ring subtending from an MS-SPRing
Figure 5-37 shows two MS-SPRings shared by one ONS 15454 SDH. The ONS 15454 SDH can support
two MS-SPRings on the same node. This capability allows you to deploy an ONS 15454 SDH in
applications requiring SDH DCSs (digital cross connect systems) or multiple SDH ADMs (add/drop
multiplexers).
Ring 1 runs on Nodes 1, 2, 3, and 4. Ring 2 runs on Nodes 4, 5, 6, and 7. Two MS-SPRing 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 MS-SPRings shown in Figure 5-37, nodes in
different MS-SPRings can use the same node ID.
Figure 5-37 An MS-SPRing subtending from an MS-SPRing
Node 3
Node 1
Node 2
MS-SPRing
SNCP
Node 4
Slot 13
East
Slot 12
East
Slot 12
East
Slot 12
East
Slot 13
East
Slot 6
West
Slot 5
West
Slot 5
West
Slot 5
West
Slot 6
West
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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
MS-SPRing 1 MS-SPRing 2
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