[ovs-discuss] OVS Queues min rate not maintained

Haleema Sadia haleema.s.mahmood at gmail.com
Wed May 6 05:19:48 UTC 2015


Okay I dug a little deeper in htb queues and I have realized that my
concept was a little messed up. What I thought was if we send packets at a
rate less than that of the minimum rate the egress queue should either stop
it or increase it to its minimum specified rate.

But thats not the case.

On Tue, May 5, 2015 at 11:28 AM, Haleema Sadia <haleema.s.mahmood at gmail.com>
wrote:

> I followed the same tutorial. I am generating traffic through iperf. And
> my topology is from the mininet, one switch and three hosts.
>
> I generate udp packets, with the network bandwidth below the minimum rate.
> And that is what I can't understand. If I have set a minimum rate and my
> specified bandwidth is below it, shouldn't it just stop the packets? or
> perhaps increase the bandwidth till the minimum rate?
>
>
>
> On Tue, May 5, 2015 at 6:35 AM, Manik Sidana <maniksidana019 at gmail.com>
> wrote:
>
>> This is a good short tutorial for qos.
>>
>> http://dannykim.me/danny/openflow/57771?ckattempt=1
>>
>> How are you generating traffic ? One issue could be that the network
>> bandwidth is below the mininum rate that you have specified.
>>
>> Are you using mininet and iperf for your topology?
>>
>>
>> *Sent from Samsung Galaxy Note!!!*
>>
>>
>>
>> -------- Original message --------
>> From: Haleema Sadia <haleema.s.mahmood at gmail.com>
>> Date: 04/05/2015 17:48 (GMT+05:30)
>> To: discuss at openvswitch.org
>> Subject: [ovs-discuss] OVS Queues min rate not maintained
>>
>>
>> Hi everyone,
>>
>> I am trying to configure queues on OVS. The topology I have is one switch
>> and three hosts connected to it. The issue with my queues is that when I
>> give different min and max rates for a queue, the min-rate threshold is not
>> being maintained. The bandwidth goes below the min-rate specified. However,
>> the bandwidth never exceeds the max-rate specified.
>>
>> Can you please explain to me this phenomena? Moreover, where else should
>> I look to understand queues better?
>>
>> Thanks!
>>
>> Haleema.
>>
>
>
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