Hi Edgar,
I don't have experience with that device myself but if SolarWinds is misreading the interface bandwidth, you can override the detected value with your own custom bandwidth values by editing the interface properties (Edit Interface from the Interface Details page, or Edit Properties from Manage Nodes). If you want to edit them in bulk (if they all have the same bandwidth), you can use the Manage Nodes screen to select the interfaces, then click Edit Properties.
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If you click on the interface, you can see the detected speed (before and after):
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After some refreshing the utilisation percentage should reflect the new values.
