On Mon, 2009-08-17 at 21:39 +0530, ratheesh k wrote: > Hi , > > > > > lan > wan > ----------------------------> eth0 > --------------------------------------------> eth1 > ---------------------------------> > > suppose a packet is going from lan to wan . First it will go > > prerouting chain -----> forward ---> postrouting chain > > > > > i want to know when qos rules on both interfaces will be executed with > respect to iptables chain ?? . forward chain will be executed after > qos rules on eth0 is executed , ????<snip> Hello, Ratheesh. I've hesitated to answer because I am not an expert on this subject but I see the list has been quiet today. How are you establishing the QoS handling? I'm not sure if the process varies if you set up a custom handler using tc (or at least I believe it is tc). Our setup uses the default pfifo_fast packet queueing. In that case, we are setting the ToS bits or DSCP bits using the PREROUTING chain of the mangle table. But I gather that is not really what you are asking. I think you are asking, if packet A enters netfilter processing followed by packet B and packet B is set to be prioritized ahead of A by whatever method - ToS bits, packet marking - will B go through the filter table first or will A. Is that correct? If so, I do not know the answer but you can probably find out with some creating logging. Set up a log rule in the very beginning of your filter table. Send a mix of prioritized and non-prioritized packets and see in which order the log records them. Kindly post your results to the list as I am curious now that you have asked the question :-) Hope this helps - John -- John A. Sullivan III Open Source Development Corporation +1 207-985-7880 jsullivan@xxxxxxxxxxxxxxxxxxx http://www.spiritualoutreach.com Making Christianity intelligible to secular society -- To unsubscribe from this list: send the line "unsubscribe netfilter" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
