Sncp Dri - Cisco ONS 15600 Reference Manual

Chapter 8 SDH Topologies and Upgrades
Figure 8-11
Primary
Secondary

8.5.2 SNCP DRI

Figure 8-12
Nodes 4 and 5 are the interconnect nodes, and in Ring 2, Nodes 6 and 7 are the interconnect nodes.
Duplicate signals are sent from Node 4 (Ring 1) to Node 6 (Ring 2), and from Node 5 (Ring 1) to 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).
78-18400-01
ONS 15600 SDH Integrated MS-SPRing Dual-Ring Interconnect
Node 1
Node 8
Node 7
Service Selector
Primary Path (working)
Secondary Path (protection)
shows ONS 15600 SDHs in a traditional drop-and-continue SNCP DRI topology. In Ring 1,
Node 2
MS-SPRing 1
Node 4
Node 5
MS-SPRing 2
Node 6
Cisco ONS 15600 SDH Reference Manual, Release 9.0
8.5.2 SNCP DRI
Secondary
Node 3
Primary
8-13