The Packetmaster EX can be used as intelligent patch field. This is feature is possible because the EX has no designated in and out port configuration. Each port is an input and an output at the same time.
Virtual environments needs virtual Taps, virtual Taps need GRE to send it over the virtual switchto a real monitoring device. All Packetmaster units can decapsulate GRE traffic to get the data in their original format.