vSS: vSwitches are configured on each ESXi/ESX host.
vDS: The configuration of vDS is centralized to vCenter Server. The ESXi/ESX 4.x and ESXi 5.x hosts that belong to a dvSwitch do not need further configuration to be compliant.
These features are available with both types of virtual switches:
- Can forward L2 frames
- Can segment traffic into VLANs
- Can use and understand 802.1q VLAN encapsulation
- Can have more than one uplink (NIC Teaming)
- Can have traffic shaping for the outbound (TX) traffic
These features are available only with a Distributed Switch:
- Can shape inbound (RX) traffic
- Has a central unified management interface through vCenter Server
- Supports Private VLANs (PVLANs)
- Provides potential customization of Data and Control Planes