Virtual Network

1. Physical Hardware > Physical NIC
2. Virtual Hardware
   • Virtual NIC
     • Virtualization
       • VMXNET
       • VMXNET2
       • VMXNET3
     • Emulation
       • e1000
       • e1000e
   • Virtual Switch
     • L2 Switch(MAC needed)
     • Not Based on Hardware
     • CPU Dependence 
     • Doesn't Learn MAC addr why? creation by hypervisor
     • How to make MAC? OUI + Number
     • vSwtiches do not require STP because they are not connected
     • VLAN and Trunk Support
       • if using VLAN with esxi supports 802.1q therefore physical nic supported 802.1q
     • Addtional Feature : Security, QoS, FO, LB
     • Standard Virtual Switch(SVS)
     • Distribute Virtual Swtich(DVS)
     • port group
       • vm port group = vmnic
       • vm kernel port group =  hypervisor ( for externel connect) = vmk
         • vm kernel port is only one connect therefore called vm kernel port