Figure 5-39 A Path-Protected Mesh Network - Cisco 15454-TCC - Network Processor Card Operation Manual

Chapter 5 SONET Topologies

Figure 5-39 A path-protected mesh network

Node 1
Node 11
PPMN also allows spans of different SONET line rates to be mixed together in "virtual rings."
Figure 5-40
backbone ring through OC-12 fiber. The "virtual ring" formed by Nodes 5, 6, 7, and 8 uses both OC-48
and OC-12.
November 2001
Node 2
Node 10
Protect traffic
Node 9
shows Nodes 1, 2, 3, and 4 in a standard OC-48 ring. Nodes 5, 6, 7, and 8 link to the
Source
Node
Node 3
Node 4
Node 8
Node 7
Destination
Node
Cisco ONS 15454 Installation and Operations Guide
Path-Protected Mesh Networks
Node 5
Node 6
= Primary path
= Secondary path
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