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Chapter 23 E-Series and G-Series Ethernet Operation
E-Series Shared Packet Ring Ethernet Circuits
Figure 23-20
Single-Card EtherSwitch or Port-Mapped Point-to-Point Circuit
192.168.1.25
255.255.255.0
VLAN test
Slot 4
Note
ONS 15454 2
ONS 15454 3
192.168.1.50
255.255.255.0
VLAN test
Slot 15
32161
ONS 15454 1
A port-mapped, point-to-point circuit cannot join an E-Series port-based VLAN, but can transport
external VLANs.
E-Series Shared Packet Ring Ethernet Circuits
A shared packet ring allows additional nodes (besides the source and destination nodes) access to an
Ethernet STS circuit. The E-Series card ports on the additional nodes can share the circuit’s VLAN and
bandwidth. Figure 23-21 illustrates a shared packet ring. Your network architecture might differ from
the example.
Figure 23-21
Shared Packet Ring Ethernet Circuit
Backbone router
Access router
SONET/SDH Ring
Access router
Access router
ONS Node
Access router
ONS Node
Access router
Access router
SONET
Ethernet
32165
ONS Node
Ethernet Card Software Feature and Configuration Guide, R7.2
January 2009
23-25