VMware Virtual Distributed Switch (VDS) provides virtual networking by using a minimum of four uplinks that are presented to the hypervisor.
vNICs are equally distributed across all available physical adapter ports to ensure redundancy and maximum bandwidth. Equal distribution provides consistency and balance across all Cisco UCS B-Series Blade Servers and Cisco UCS C-Series Rack Servers, regardless of the VIC hardware.
VMware vSphere ESXi has a predictable uplink interface count. All applicable VLANs, native VLANs, MTU settings, and QoS policies are assigned to the vNIC if migration to VMware VDS from uplinks is required.