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Hot on the heels of VMware’s $1.26 billion acquisition of Nicira, Oracle said it will buy Xsigo for its software-defined networking (SDN) technology. SDN gear does to the network what VMware did to servers. It virtualizes the hardware and gives control to a software application, thereby managing traffic loads in a more flexible and efficient way. The challenge for users adopting SDN technology is to ensure that network policies on the regular network are in synch with virtual switches. For example, a virtualization admin sets policies on the vSwitch; the virtual machine moves off that server. Suddenly it’s using a regular switch where the policies are different and the application breaks. Much like the early days of server virtualization, admins will need to consider how virtualization impacts their total environment to avoid causing unnecessary disruption to services.