I'am monitoring a specific port on a HP procurve 2900 series with PRTG monitor. This with the Sflow sensor and also the snmp sensor. the snmp sensor shows realistic network traffic. The Sflow sensor shows almost double network traffic than the snmp sensor.
It looks like the Sflow is getting to much data. I saw on internet something about ingress and egress traffic, but not sure how this relates to Sflow.