perfSONAR User Q&A and Other Discussion

[Alan Whinery <>]

Brian  T. - Yes, he said there was a firewall.

Brian Koch,

If NDT is enabled as a service on the target host, can you do

web100clt -l -n <targethost>

and send the results?

Note: if you are sanitizing, the IP target's name or IP appears once in
the output.



On 5/2/2014 11:04 AM, Brian Tierney wrote:
> With 909 retransmits, you will never get much about 1Gbps.
>
> How "full" is that path? Is there a firewall on the path? Also look at
> errors on all your router / switch interfaces.
> There may be a dirty fiber.
>
>
>
>
> On Fri, May 2, 2014 at 1:52 PM, Koch, Brian 
> <>
>  wrote:
>> Latency shows ~0.7ms with 0% loss.
>>
>> -----Original Message-----
>> From: Brian Tierney 
>> [mailto:]
>> Sent: Friday, May 02, 2014 3:35 PM
>> Cc: Koch, Brian; 
>> 
>> Subject: Re: [perfsonar-user] bwctl speed questions
>>
>> Brian: What latency is the path you are testing? Does owamp show any 
>> packet loss on that path?
>>
>> Try doing a test with iperf3, which will give you TCP retransmit  count.
>>
>> bwctl -c hostname -I iperf3 -i1 -fm -x -t20
>>
>>
>>
>>
>> On Fri, May 2, 2014 at 7:47 AM, Aaron Brown 
>> <>
>>  wrote:
>>> Hey Brian,
>>>
>>> Unfortunately, there’s not a way to do multiple streams currently. The 
>>> idea was to show how single stream performance looked since any network 
>>> can be made to look good with enough streams :) The next version of the 
>>> Toolkit should include the ability to configure number of streams, 
>>> however.
>>>
>>> Cheers,
>>> Aaron
>>>
>>> On May 2, 2014, at 10:04 AM, 
>>> 
>>>  wrote:
>>>
>>>> Is there a way to run multiple data streams? I'm not sure why the
>>>> data path is fully tested.
>>>> Connections:
>>>> Perfsonar --> core router (10G)
>>>> core router --> firewall (10G) (fw throughput = 2G) firewall -->
>>>> outside WAN router (10G) outside WAN router --> perfsonar (10G)
>>>>
>>>> Theoretically, I should be seeing close to 2Gbps on my bwctl graphs,
>>>> but graphs are barely showing over 1Gbps.
>>>>
>>>> Are there some settings I need to tweak? I'm a little new to this.
>>
>>
>> --
>> Brian Tierney, http://www.es.net/tierney
>>
>> Energy Sciences Network (ESnet), Berkeley National Lab
>>
>> http://fasterdata.es.net
>
>