title: how to add a LineCard to openvswitch?
body: <p>I need to put the timestamp in which the packet has been received in to packets header as a user set field and for this purpose I need to add an extra LineCard(some kind of network card) to the OVS to get the timestamp. do you have any idea how I can add a LineCard to the OVS and how can I get the timestamp from it?</p>