Cisco Systems 15454-FTF2 12.4.2 Path Protection DRI

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Cisco ONS 15454 Reference Manual, R8.5.x
78-18106-01
Chapter 12 SONET Topologies and Upgrades
12.4.2 Path Protection DRI
Figure 12-21 Integrated BLSR DRI on the Edit Circuits Window
12.4.2 Path Protection DRI
Figure 12-22 shows ONS 15454 nodes in a traditional drop-and-continue p ath protection DRI topology.
In Ring 1, Nodes 4 and 5 are the interconnect nodes, and in Ring 2, Nodes 6 and 7 are the interconnect
nodes. Duplicate signals are sent between Node 4 (Ring 1) and Node 6 (Ring 2), and between Node 5
(Ring 1) and Node 7 (Ring 2). In Ring 1, traffic at Node 4 is dropped (to Node 6) and continued ( to Node
5). Similarly, at Node 5, traffic is dropped (to Node 7) and continued (to Node 4).