Open the NetMon Web Management interface.
On the top navigation bar, click Configuration, and then click the Network tab.
Enable one or more interfaces to capture. NetMon accepts the following traffic types:
TAP. A network Test Access Point (TAP) sends traffic from a hardware switch to NetMon. A TAP connection requires a dedicated physical port. For more information, see Install NetMon Appliance Hardware.
SPAN. Switched Port Analyzer (SPAN) ports, also called mirroring ports, send a copy of network packets from one port to another port. A SPAN connection requires a dedicated physical port.
GRE. Generic Route Encapsulation (GRE) allows traffic to be routed over IP networks without a dedicated physical TAP or SPAN port. When GRE is enabled, traffic can only be captured on the NetMon management interface.
Virtual. NetMon can capture traffic from a VMware vSphere virtual machine. For more information, see Configure the NetMon on a VMware vSphere Virtual Machine.
For more information, see Change Network Parameters.
Click Apply Changes.
NetMon restarts with the new settings, which may take a few minutes.