There’s no question that server virtualization has changed data center networking requirements in many ways. Multiple VMs per host has driven the need for 10Gb NICs and access switch ports. VXLAN can be considered Layer 2.5 on the OSI stack as it combines simplicity of L2 switching with the cross-domain connectivity of L3 routing. The biggest challenge here is carbon- rather than silicon-based, says John Defterios. Do networking professionals have the right skills to take advantage of this functionality?”]