P 1
P 2
P 3
P 4
P 5
Optical steering domain
WSS 1
In
Out
Pod
…
Operator’s
access/metro
Internet
Optical steering domain
Pod 1
Pod 2
Pod n
Mux
SDN controller
Cloud manager
WSS 2 WSS 3
P 1
P 2
P 3
P 4
P 5
P 1
P 2
P 3
P 4
P 5
Operator’s DC/cloud
Figure 5.11 Optical service function chaining framework.