https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=236067

--- Comment #4 from Lev A. Serebryakov <l...@freebsd.org> ---
(In reply to Eric Joyner from comment #2)
I've added i210 (in form of I210-T1 addon card) to my traffic generator system,
and it is limited by receiver (82574L) too!

Both ends have FC turned off (with `dev.igb.0.fc=0` and `dev.em.0.fc=0`
respective). I've tried with and without switch between. So, two more
datapoints:

i210 -> Switch -> 82574L - pkt-gen generates PPS limited by receiver.
i210 -> 82574L - pkt-gen generates PPS limited by receiver.
i210 -> Switch -> "blackhole" (no other devices attached to switch) - pkt-gen
generates line-rate PPS.

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