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10 Software-Defined Networking Architectures

Software-defined networking is a hot topic for debate in the industry. Experts argue about the best way to implement it, the ways it might affect network engineers and administrators, and how it might disrupt the traditional power structure in the networking industry. While there are a lot of opinions about this emerging technology, there's one inescapable fact: SDN has brought new attention and innovation to the network. To get a view into the various approaches to SDN, we asked 10 vendors to
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IBM Software Defined Network for Virtual Environments creates a virtual network for virtual machines. This virtual network is decoupled and isolated from the physical network much like a virtual machine is decoupled and isolated from its host server hardware.

IBM touts several advantages with this approach:

  • Virtual networks can be created without any changes to the existing network.
  • Since the physical network does not have to be changed, it can be wired once.
  • Provisioning and administration can be simplified and automated.
  • IP and MAC addresses can be reused, permitting logical separation of networks for multi-tenancy.

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