- In VMWare ESXi, navigate to Networking > Virtual switches > Add Standard virtual switch. 
- Type a name for the VSwitch. 
- In Uplink 1, select the physical NIC the span/mirror port is connected to.  
- Click Add. 
- Under Port groups, select Add port group. 
 Best Practice The suggested name for the port group is SPAN.
- Type a name for the port group. 
- In VLAN ID, type - 4095.
- Under Security, do the following: - In Promiscuous, enable Accept. 
- In MAC Address changes, enable Inherit from vSwitch. 
- In Forged transmits, enable Inherit from vSwitch.  
 
- Click Add. 
