[ovs-discuss] Enqueueing traffic from different machines.
Jesse Gross
jesse at nicira.com
Thu Jan 10 17:17:50 UTC 2013
Please stop starting new threads about the same question..
On Thu, Jan 10, 2013 at 3:27 AM, Mathumitha S <cerisierfilix at hotmail.com> wrote:
> Hi,
> I have OpenvSwitch installed in a computer that has a quad port.
> eth3, eth4 and eth5 are connected to br0 with respective open flow port
> numbers as 1,3,2 and the respective IP addresses of the machines connected
> to the ports are 10.6.3.2, 10.6.1.2 and 10.6.2.2
>
> I use eth3 and eth4 i.e ports 1 and 3 as input port and eth5 (port 2) as
> output port of OvS. I created 3 queues at eth5 using the following command:
>
> ovs-vsctl -- set port eth5 qos=@newqos -- --id=@newqos create qos
> type=linux-htb other-config:max-rate=1000000000 queues=0=@q0,1=@q1,2=@q2 --
> --id=@q0 create queue other-config:min-rate=1000000
> other-config:max-rate=1000000 -- --id=@q1 create queue
> other-config:min-rate=20000000 other-config:max-rate=20000000 -- --id=@q2
> create queue other-config:min-rate=10000000 other-config:max-rate=10000000
>
> I used the following commands to define the flows:
>
> ovs-ofctl add-flow br0 "in_port=2,actions=flood"
> ovs-ofctl add-flow br0 "in_port=1,priority=0,actions=enqueue:2:0"
> ovs-ofctl add-flow br0 "in_port=3,priority=0,actions=enqueue:2:0"
> ovs-ofctl add-flow br0
> "in_port=3,dl_type=0x0800,nw_proto=6,tp_dst=6000,priority=7,actions=enqueue:2:2"
> ovs-ofctl add-flow br0
> "in_port=1,dl_type=0x0800,nw_proto=6,tp_dst=6005,priority=7,actions=enqueue:2:1"
>
> I use iperf at the machines to generate traffic and I got the expected rates
> of 20 Mbps and 10 Mbps (approx) for the machines connected to ports 1 and 3
> respectively.
>
> But if I change the max-rate values for the queues and set it equal to the
> max-rate of the qos, I get rates as 100 Mbps for both the machines even if I
> generate traffic at the same instant.
>
> The command used is
> ovs-vsctl -- set port eth5 qos=@newqos -- --id=@newqos create qos
> type=linux-htb other-config:max-rate=1000000000 queues=0=@q0,1=@q1,2=@q2 --
> --id=@q0 create queue other-config:min-rate=1000000
> other-config:max-rate=1000000 -- --id=@q1 create queue
> other-config:min-rate=20000000 other-config:max-rate=100000000 -- --id=@q2
> create queue other-config:min-rate=10000000 other-config:max-rate=100000000
>
> If I generate traffic at the same time from both machines, then the
> available bandwidth should be shared between the 2 queues in the ratio of
> their respective weights, right? But then why am I not able to see the
> bandwidth sharing? Please let me know where I am going wrong.
>
> If I queue 2 different flows from the same machine in different queues, then
> I can see that the bandwidth is shared. But when I use traffic from 2
> different machines connected to 2 different input ports, I am not able to
> see the bandwidth sharing. Where am I making a mistake?
>
> Thank you
>
> Regards,
> Mathumitha
>
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