Specifications

30 Chapter 4 Protected Network Topologies
Node and
Tunnel
Diversity for
Low Order
Tunneled
Services
Use of Low Order end-to-end tunneled services in your network requires additional
planning for node and tunnel diversity. For more information on Low Order end-to-end
SONET services, see the TransNav Management System Provisioning Guide,
Chapter 28—“Creating SONET Low Order End-to-End Services and Tunnels.”
In the following example, the two services shown have diverse tunnels but are not node
diverse since both tunnels are routed through the same node (Node CS 131).
Figure 12 Low Order End-to-End Tunnel Diversity
Mesh
OC-48
Mesh
Mesh
OC-48
CS 111 CS 112
CS 132 CS 131 DP 101
CS 133 DP 102
OC-192
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