Over the past year, infrastructure and operations (I&O) professionals have focused their enterprise networking efforts on readying network infrastructure to support virtualization, consolidation, and enabling a private cloud. The networking industry initially missed the virtualization train and has been playing catch-up ever since. Vendors have raced to release products and solutions geared toward helping the networking teams catch up to the virtualization revolution. This report focuses on critical selection criteria for evaluating the data center networking vendors and the ways in which your maturity with server virtualization should influence vendor choice.