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HYBRID NETWORKING
© 2010 Taylor & Francis Group, LLC
OpenFlow some switch features that are not supported in the stan-
dard protocol (e.g., Lambda switching).
One fundamental restriction of this approach is sacrificing the reac-
tive mode of operation of OpenFlow, which packets without a matching
rule are forwarded to the controller via packet-in events. At this stage,
LegacyFlow does not support this type of send-to- controller actions
in non-OpenFlow devices. Hence, these legacy devices will generally
be used in network segments that interconnect OpenFlow switches
located at the ingress or egress point of a flow. Figure 8.3 illustrates
edge s ...