Chapter 5
SONET Topologies
Figure 5-16 A basic four-node UPSR
Figure 5-17 A UPSR with a fiber break
June 2002
ONS 15327
Node ID 0
ONS 15327
Node ID 3
ONS 15327
Node ID 2
Source
ONS 15327
Node ID 0
ONS 15327
Node ID 3
Destination
ONS 15327
Node ID 2
ONS 15327
Node ID 1
= Fiber 1
= Fiber 2
ONS 15327
Node ID 1
Fiber
break
= Fiber 1
= Fiber 2
Cisco ONS 15327 User Documentation, R3.3
Unidirectional Path Switched Rings
5-21