perfSONAR User Q&A and Other Discussion

[Andrew Lake <>]

Hi Winnie,

I can’t seem to reach lcgnetmon02.phy.bris.ac.uk or run bwctl tests to it 
from any host. My guess would be you have some firwall issues. The red dots 
on the graphs of t2ps-bandwidth.physics.ox.ac.uk and  
perfsonar-bw.tier2.hep.manchester.ac.uk seem to indicate they can’t connect 
to the BWCTL “peer ports” which is TCP and UDP ports 6001-6200. Same with 
psum02.aglt2.org. My guess is you have a firewall filter blocking TCP and/or 
UDP 6001-6200 somewhere. As far as I can tell the regular_testing update had 
nothing to do with it. You can also look in 
/var/log/perfsonar/regular_testing.log. I suspect there will be a bunch of 
errors like "bwctl: Unable to initiate peer handshake with [X.X.X.X]:6XXX - 
canceling”.

Hope that helps,
Andy

> On May 19, 2015, at 5:33 AM, Winnie Lacesso 
> <>
>  wrote:
> 
> Forgot a subject! got one now. 
> 
> Forgot to add:
> 
>> If eg choose t2ps-bandwidth.physics.ox.ac.uk (not too far from Bristol)  
>> or perfsonar-bw.tier2.hep.manchester.ac.uk, there is a graph, but only 
>> red-dot Error; hit "1m" => pretty clear it was ok till 27 April & stopped 
>> abruptly in the early hours, to both ox & mancs.
> 
> One assumes BTW that the problem *may* be the other end, esp if it updated 
> 27
> April wee hours same time as Bristol's BW box; but there seem N boxes in the
> UK (for instance) to which the Oxford perfsonar BW box seems fine (more than
> Bristol's) right up to Now. 
> 
> So, it seems unlikely that the update in 27 April wee hours was a serious
> cause of breakage. But not sure.
> 
> Grateful for advice!
>