If I had a qdisc with handle 0:3 would the behavior be different? Thanks a lot for the response! Bhanu On Tue, Feb 1, 2011 at 8:36 AM, Patrick McHardy <kaber@xxxxxxxxx> wrote: > Am 01.02.2011 17:31, schrieb Bhanu CV: >> Hi, >> >> I am trying to change the skb priority of the packets going out to a >> particular destination. Then I use vlan set_egress_map to change the >> vlan priority of the packet. This works as I want it to, the confusing >> part is I do not know why it works! >> >> I use the following two commands: >> >> change the skb->priority (?) for the packets that I am interested in to 3: >> iptables -t mangle -A POSTROUTING -d 192.168.10.75 -j CLASSIFY --set-class 0:3 >> >> change the vlan priority of the packet leaving over the vlan >> vconfig set_egress_map eth4.2 3 3 >> >> This does send a packet on the wire with MAC layer priority of 3, >> which is what I want. What I am trying to understand is the action >> that iptables is taking. I do not have any class under the root qdisc >> on eth4. The root qdisc has handle 0: >> >> It would be great if someone could explain how iptables is classifying >> the packet in a way which changes the skb->priority of the packet. > > It simply changes the skb->priority value, which used by the VLAN > driver to map to VLAN proprities. This is done by the VLAN driver > internally and unrelated to qdiscs. > -- To unsubscribe from this list: send the line "unsubscribe netfilter-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
