VLAN tagging can be applied to packets on output ports, indicating the packet's ingress port, giving users the ability to know where in the network a packet was captured as well as verifying that packet's flow throughout an infrastructure.
Doubling as an alternative Port Stamping mechanism, the VLAN tag is made up of a user-defined starting value that represents the TAP and a specific number for the ingress network port on the TAP.
These settings apply when Monitor Port VLAN Tagging is enabled on any monitor port. Their context within an Ethernet packet is shown below.
The table below shows the value of the VLAN tag VIDs that are assigned to each network port, base on the "Starting VID" selection.