[ixpmanager] Odd behaviour in MRTG graphs

[Marinos Dimolianis]

Hi all,

We (in Greek Internet Exchange - GR-IX) are facing a strange issue in 
the IXP Manager (V5.7.0).

Almost every single time we perform a change in the MRTG configuration 
e.g. adding a new port, we observe some distortions in our MRTG graphs 
as illustrated in the left part of the figure below:

There are two "strange" things that happen: (i) if we change again the 
MRTG configuration the diagrams may return to the "normal" state and 
(ii) this behaviour is observed on aggregate graphs (e.g. Infrastracture 
graphs, overall peering graphs) and not on the ones that correspond to 
the physical port of a switch.

Has anyone faced anything similar to this?

We would be really grateful if you could provide us your feedback.

Kind Regards,

Marinos Dimolianis

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