Hello, I have been trying to get the RED qdisc and ECN to work for the past few weeks and all my experiments have failed. Here is the setup I am using.
Src -- R1 -- R2 -- Dst Between Src and R1 is a 100Mbps link and between R1 and R2 a 10Mbps link. I set up the qdisc at R1 as follows tc qdisc add dev eth3 root handle 1: prio tc qdisc add dev eth3 parent 1:1 handle 10: sfq tc qdisc add dev eth3 parent 1:2 handle 20: sfq tc qdisc add dev eth3 parent 1:3 handle 30: red limit 10000 min 3000 max 5000 avpkt 1000 burst 5 probability 0.5 bandwidth 256kbit ecn I also inserted printk statments inside the code to print the calculate queue average (RED param), the backlog (Qdisc param) and the queue length (sk_buff_head param). I also inserted print statements for each action of RED i.e. DONT_MARK, PROB_MARK, HARD_MARK and DROP. For the purpose of my experiments, I transferred a 25 MB file. I also did 100 simultaneous TCP transfers for 2 mins using ipref. In all cases none of the packets were either marked or dropped by the RED code. This was verified by the print statements in the logs. For all runs, qavg and backlog were 0 and qlen was 1. I have even tried classless red and got same results. Does anyone know whether RED+ECN work ? Any tests and setups that someone has used and got successful results ? I would really appreciate any input or suggestions on this. Thanks, Rahul. - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
