And also TCP throughput binds to RTT. Generally, RTT is proportional to the
number of the network devices (it's ovs here) used for transmission.
2014-12-04 13:38 GMT+09:00 Satoshi KOBAYASHI <[email protected]>:
> Hi,
>
> The bandwidth of that situation is provided by Mininet (Probably,
> implementation is Linux TC). IOW, there is no direct relation between Ryu
> and its bandwidth. But the point that simple_switch_13 is 'Reactive' type
> may have a hint.
>
> 2014-12-04 10:58 GMT+09:00 lbo.xidian <[email protected]>:
>
>> Hi,
>> When I use iperf to measure the bandwidth between two end hosts in
>> Mininet with Ryu, the bandwidth is lower than link capacity as defined in
>> Mininet seriously. The related information about my experiment is shown in
>> below:
>> topology in Mininet: *sudo mn --controller remote --switch
>> ovs,protocols=OpenFlow13 --link tc,bw=10 --topo tree,depth=3 --mac*
>> ryu: *simple_switch_13*
>> the test results are:
>> /**********************
>> mininet> iperf h1 h8
>> *** Iperf: testing TCP bandwidth between h1 and h8
>> *** Results: ['2.60 Mbits/sec', '2.93 Mbits/sec']
>> mininet> iperf h1 h8
>> *** Iperf: testing TCP bandwidth between h1 and h8
>> *** Results: ['2.55 Mbits/sec', '2.87 Mbits/sec']
>> **************************/
>> The end-to-end bandwidth measured is only 2.93Mbits, which is lower than
>> 10Mbits/sec seriously.
>> When I use a single switch topo: *sudo mn --controller remote --switch
>> ovs,protocols=OpenFlow13 --link tc,bw=10 --mac*
>> the results are:
>> /************************
>> *** Iperf: testing TCP bandwidth between h1 and h2
>> *** Results: ['9.78 Mbits/sec', '10.4 Mbits/sec']
>> **********************/
>> I don't know why the bandwidth is so small than defined
>> Any help is much appreciated.
>> Thanks!
>>
>>
>>
>>
>>
>>
>>
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>>
>
>
> --
> Satoshi KOBAYASHI <[email protected]>
>
--
Satoshi KOBAYASHI <[email protected]>
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