You want to check this function on ensp ? i think then ensp should not support this function, you can try to use the real device to test and check, the real device should support.
I think you can use ping with the source ip of the interesting traffic with large packet size and large number of counts using the -a / -c / -s parameters :
ping [ ip ] [ -a source-ip-address | -c count { -s packetsize | -range [ min min-size | max max-size | step step-size ] * }
if you want to make test , i can provide lab to you . in our lab , there are many physical device can be used . you can make a lot of test in real environment . if you want to do it , please contact to me .
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