Virtual network of VMware vsphere Virtualization Solutions

　To get a better understanding of vsphere network virtualization solutions, here are some concepts that allow us to better understand virtual networks.

First, the network card:

Physical network card is called Vmnic, in ESXi, the first physical network card is called Vmnic0, the second block is called Vmnic1.

Virtual network cards are referred to as VNIC, each virtual machine can have more than one virtual network card to connect to the virtual switch.

Second, Virtual Switch:vSwitch, for the connection between virtual Switch and external physical network connection, divided into:

1) Standard switch: An easy switch managed by ESXi, providing virtual port groups, Vmkernal, NIC team three port groups.

2) Distributed switch: A high-level switch that can be centrally managed for multiple ESXi, providing a distributed port/port group.

3) The switch provided by the third party.

Third, VMware Vsphere offers three network architectures:

1) An ESXi host, a vmnic. The above runs multiple virtual machines and multiple vnic, the disadvantage: only one physical network card, load, no redundancy, will cause a single point of failure, such as Nic Bad.

2) One ESXi host, multiple vmnic, multiple vnic. Advantages: Increased bandwidth, increased redundancy, more vnic, not easy to cause a single point of failure, but if the server itself fails, still can not guarantee the normal communication of virtual machine network.

3) More than one esxi, multiple vmnic. Using distributed switch global management reduces the amount of work that each ESXI server configures separately, but increases the authorization cost of ESXi, more servers, more licenses, more physical switches, and more complex network configurations.

Virtual network of VMware vsphere Virtualization Solutions