I have observed that fping (v4.0) discards all ICMP reply if the delay is greater than per host sending interval (set using -p).

flent uses fping with per host interval as 0.2 (200 ms), which is very low if netserver is far from flent client (Example RTT > 200 ms). In such case flent will not be able to generate ping results.

Same problem occurs when we setup a test bed and add extra delay using netem between flent client and netserver.

I think flent should handle this scenario.

Thanks and Regards,

Sourabh Jain