legacy protocol stack and openflow ...

Nice paper about legacy protocol stack move to o logically centralized
controllers using the OpenFlow protocol...

Check out! :)
ABSTRACT
Computing history has shown that open, multi-layer hard-
ware and software stacks encourage innovation and bring
costs down. Only recently this trend is meeting the net-
working world with the availability of entire open source net-
working stacks being closer than ever. Towards this goal, we
are working on QuagFlow, a transparent interplay between
the popular Quagga open source routing suite and the low
level vendor-independent OpenFlow interface. QuagFlow is
a distributed system implemented as a NOX controller ap-
plication and a series of slave daemons running along the
virtual machines hosting the Quagga routing instances.


http://www.dca.fee.unicamp.br/~chesteve/pubs/quagflow-sigcomm10-poster.pdf