for at least some gigabit NICs (and, I suspect, all of them on FreeBSD).
Specifically, I know it doesn't work for Intel gigabit NICs that i
use the em(4) driver.
This appears to be due to dodgy bitwise math in the upstream code.
However, I note that the website given for the upstream code no
longer appears to be working, so I'm not sure that there IS an
upstream maintainer any longer.
PR: ports/190160
Submitted by: Rob Levandowski <robl@macwhiz.com>
bf8eb49b19