Hi Krishna, 1) If you want to classify according to MAC address, you could use iptables to mark the packet (using MARK target), but just source MAC is available for now. 2) Usually tc just could classify by fields of IP layer and its sublayer, so I think classify by ethertype is unavailable. 3) VLAN tag belongs to MAC layer! I'm not sure how to QoS for VLAN, can anybody give some advice? Bests, Yongle Lai Hi, I am a newbie working on tc tool, i want to know whether we have the following classifiers available (1) source MAC address. (2) destination MAC address. (3) IEEE 802.1D user priority. (4) Ethertype (IEEE 802.3, 1998 Length/Type Field). Can any one help me in finding the help for the above classifiers. Thanks in advance Krishna Chaitanya _______________________________________________ LARTC mailing list LARTC@xxxxxxxxxxxxxxx http://mailman.ds9a.nl/cgi-bin/mailman/listinfo/lartc