The Header Stripping feature is a licensable addition to the GigaSMART® engine that removes tags, headers and encapsulations that can interfere with packet analysis tools. Header Stripping efficiently examines packets for specified headers, such as MPLS, VLAN, VXLAN, VN-TAG and GRE, and removes them before sending the packets to the appropriate security and analysis tools. For tunneled or encapsulated traffic, such as ERSPAN, GTP and ISL, both the header and the trailer are removed before the packet is sent to its destination. Header Stripping can also be used to remove or convert FM6000 timestamps to UTC, and then append them to the packets as a trailer. In addition to stripping VLAN tags, this function can also add or replace VLAN tags.