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The Allegro Network Multimeter can ignore VLAN tags for connection tracking. Enabling this option may be necessary if network traffic is seen on the Network Multimeter that contains changing VLAN tags for the same connection. For example, depending on the configuration of the Mirror Port to which the Network Multimeter is connected, incoming traffic could contain a VLAN tag while outgoing traffic does not. In this example, a connection would appear twice in the statistics which is often the desired behaviour to be able to identify a network misconfiguration. But sometimes this behaviour is intended and the user wants to see only one connection. In this scenario the option can be enabled to ignore varying VLAN tags for a otherwise identical connection.