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OPENFLOW/SDN FOR OPTICAL NETWORKS
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and data planes, and the data plane of the optical layer was equipped
with real hardware including two TPNDs and four PXC, as shown in
Figure 14.21. In the data plane, four OF-PXC nodes integrated with
DWDM multiplexer (MUX)/demultiplexer (DEMUX) optical filters
were used. Two optical transport channel unit 2 (OTU2) (10.7 Gbps)-
based OF-TPNDs were attached at OF-PXC1/PXC2, and a shared
OF-REG was deployed at OF-PXC4. Two OF-Rs were connected to
two TPNDs. Each link was deployed with 10 wavelengths. e link/
node OSNR values (as defined in Ref. [42]) were statically configured ...