Introducing VMware Distributed Switch: What, Why, and How
A virtual switch is the software analog of a physical switch intended to connect virtual network controllers of virtual machine to networks on the second layer of the OSI model. A vSwitch is a virtual switch provided by VMware for their virtualization solutions. A standard virtual switch is a useful feature, but in large virtual environments, virtual switches on each ESXi host usually have the identical vSwitch configuration (port groups, VLANs, connected networks etc.). However, if you need to add a new port group associated to VLAN for connecting virtual machines running on ESXi hosts to that VLAN, you will need to configure vSwitch on each ESXi host identically and perform the configuration manually, which can take a long time. VMware takes this situation into account and develops a distributed virtual switch that can be configured on vCenter Server once without the need to configure standard vSwitches on each ESXi host manually. Today’s blog post covers a VMware distributed virtual switch that is also called a dvSwitch or VDS .