FastNetMon Advanced (from version 2.0.350) can calculate per interface bandwidth and packet rate using Netflow, IPFIX or sFlow as a source of data without any use of SNMP technology.
To enable this logic, you need to use the following option:
sudo fcli set main enable_interface_counters true sudo fcli commit
After that, you will be able to see per-device / per-interface traffic:
sudo fcli show interface_counters
Example:
10.1.2.1_27 in packets: 33678 out packets: 14026 in mbps: 332 out mbps: 19 10.1.2.1_64 in packets: 15536 out packets: 4337 in mbps: 153 out mbps: 5 10.1.2.1_31 in packets: 32950 out packets: 87125 in mbps: 43 out mbps: 830
We have two Grafana / InfluxDB dashboards to see traffic for all interfaces
Or for a particular interface:
To calculate the incoming and outgoing direction, we use the following logic:
Let's assume we received traffic telemetry information about transfer of X bytes, which has input_interface A and output_interface B.
We will count these bytes as outgoing for input_interface A, and we will count them as incoming for output_interface B.
Netflow or IPFIX family of protocols may include packet or flow direction provided explicitly. sFlow protocol has no way to report flow / packet direction. Even if you have this information in your telemetry stream, we do not use it for this purpose.