I asked this question about a week ago, because the percentage calculation in SNMP traffic sensor for Traffic In and Out channel is not working well.
I was advices to upgrade PRTG, since then I upgraded it twice, the last time was yesterday, upgraded to 18.104.22.1681 x64, but the problem persists
Sometimes when the GigabitEthernet reaches 5% of utilization for Traffic In, PRTG for some reason shows 332% of 900% for example..
I tried to delete SNMP traffic sensors and add them back, the percentage according to my settings changed well, but then suddenly showed this 332% alarm and the percentage (red alarm) jumped from 84% to 600%..
I have about 8 SNMP traffic sensors for 3 different devices that work like this and the Cisco 1900 routers have no difference to others (in IOS of configuration), nevertheless it happens..