VLAN (Virtual Local Area Network) tagging is where network packets are each assigned a VLAN tag in the Ethernet frame.

Virtual LANs (VLANs) allow us to subdivide a physical network into separate logical broadcast domains. Each individual broadcast domain represented by a VLAN is identified by a numeric VLAN tag. VLANs enable us to control traffic patterns by segmenting different types of traffic, e.g., performance, security or management-related traffic.

In VMX-Capture, VLAN tags allow us to represent multiple physical parts of a network infrastructure. In the case of packet aggregation/brokering, VLAN tags are usually set as switch port identifier that provides us with a visibility point identifier. VMX-Capture can then use the VLAN tag to split network traffic, for example, by checking who the VLAN source for the client is, and then splitting the traffic based on the VLAN tagging.

In deployments that use packet brokers, a Beeks Analytics visibility point may be defined by the collection of VLAN tags that are added to the traffic at that point in the network by a packet broker.

Related terms

VMX-Capture
Visibility point