I have a switch mirror port configured to sniff my wan interface with PRTG. Everything is running great, i made two packet sniffer sensors (for Upload and Download) and PRTG shows my real bandwidth i use.
But sometimes, every 5-10min, there is one entry with 0 KByte?
It looks like this for download: https://mm-vault.de/chevereto/image/7Tsx
Yes i changed the sensor interval to 10sek, but with standard 60sek there is the problem too.
So if this happens every 10min, there are 144 entrys lost on one day. So for statistics of total DL/UL on one day there can be a difference of many GB.