Hi, I want to prioritize traffic based on the ethtype (protocol field in the ethernet header). If it is an MPEG packet (to which I assign a new ethtype and write directly from the application using packet socket to avoid ip header overhead), that should be given higher priority that any ip packet (for which ethtype will be ETH_P_IP). Can this be done using iproute2 or any other tool? u32 classifier takes protocol as an argument but I am not sure if ethernet is an option ther and if so, what the format is. If this is not possible with iproute2, does anyone has any experience/ suggestion on what the best way would be to prioritize MPEG frames (without ip header, MPEG over Ethernet) over IP data. Thanks, Deepak -- ==================================================================== Deepak Bansal Address: Office: Room 503, NE43 (LCS), Graduate Student 545 Tecnology Sq., LCS, EECS, Cambridge, MA 02139 MIT Home : 5D-2, Tang Hall 550, Memorial Drive, Cambridge, MA 02139 Email: bansal@lcs.mit.edu Phones: 617-253-5155 (O) deepak_bansal@hotmail.com 617-225-1155 (R) =====================================================================