The error%, discard% and utilization % is USM on the interfaces tab are populated by enabling the following values using a template in snmpcollector:
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discard%:PctDiscards (In)
PctDiscards(Out)
error%:
PctErrors(In)
PctErrors(Out)
utilization%:
Utilization(In)
Utilization(Out)
If the values are zero then they wont display in the USM.
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?