perfSONAR User Q&A and Other Discussion

[Loukik Kudarimoti <>]

This should now be resolved. Let me know if it isn't.

There are a few interfaces which are not showing the capacity. This is 
because the script we are using needs to be tweaked to properly pick up 
information about VLANs and such.

Loukik.



Vedrin Jeliazkov wrote:
> Hello Mark,
>
> Thanks for your feedback!
>
> We also noticed this problem a few days ago. One possible thing to check in
> GEANT2 RRD MA's config is whether the counters in
>
> /home/taksometro/cricket-data/bandwidth/rt1.bud.hu.geant2.net/so-6_0_0.rrd
>
> are stored indeed in Bps (bytes per second), as reported by the service. They
> might have been instead multiplied to become bps (bits per second). However,
> even such multiplication could not justify your findings below, so perhaps
> only a closer look would reveal the real issue.
>
> Best regards,
> Vedrin
>
> Mark Gordon 
> <>
>  wrote:
>
>   
> > Hello everyone,
> >
> >          I was working with querying utilization data from 
> > measurement archives when I noticed one was reporting utilization 
> > data for an interface greater than it's capacity.  The interface in 
> > question is istf-bckp.rt1.bud.hu.geant2.net (62.40.125.65) 
> > outbound.  At the time I was querying the utilization was 6% over the 
> > capacity, but extending my search backward a little showed that it 
> > had been up as much as 60% above capacity.  I queried the MA with the 
> > following interface ...
> >
> > ....<nmwgt:interface 
> >
> >     
> xmlns:nmwgt="<http://ggf.org/ns/nmwg/topology/2.0/>http://ggf.org/ns/nmwg/topolo
> gy/2.0/">
>   
> > ....    <nmwgt:hostName>rt1.bud.hu.geant2.net</nmwgt:hostName>
> > ....    <nmwgt:ifName>so-6/0/0</nmwgt:ifName>
> > ....    <nmwgt:ifDescription>LowQ Link to ISTF 2 (Pr:T-Systems 
> > Id:041/3001)</nmwgt:ifDescription>
> > ....    <nmwgt:ifAddress>62.40.125.65</nmwgt:ifAddress>
> > ....    <nmwgt:direction>out</nmwgt:direction>
> > ....    <nmwgt:authRealm>GEANT2</nmwgt:authRealm>
> > ....    <nmwgt:capacity>155520000</nmwgt:capacity>
> > ....</nmwgt:interface>
> >
> > and got the following datum like this back
> >
> > ....<nmwg:datum timeValue="1184141100" value="2.5468027626764405E8" 
> > valueUnits="Bps"/>
> >
> > 2.5468027626764405E8 = 254680276
> > 254680276 > 155520000
> >
> > Thanks
> > -Mark 
> >
> >     
>
>
>
>