hey, all CAT7 SFTP here, the switch is a gigabit ethernet layer3 cisco sg300-28

NIC is binded at 1Gigabit full duplex
anyway doing ftp from other machines in my lan i get about 22MegaBytes/sec
the issue is only with downloading from the internet
where all W10 machines are a very lot faster, even the very old netbook asus eee pc and the smartphone

i've tried right now to download a big file from a eCS2.1 server in my LAN and it download via the old ibm ftp at 13MegaBytes/sec
that is not excellent, but surely quite good and sufficient for me
i repeat the issue is downloading http/s or ftp from the internet only
of course i see performances not real (in downstreaming) also from the varius speedtests (eg. ookla speedtest.net)
massimo