Brand new RP4 8GB.
Linux raspberrypi 5.4.51-v7l+ #1327 SMP Thu Jul 23 11:04:39 BST 2020 armv7l GNU/Linux
I'm one of the lucky people who have 1Gbs internet connectivity. When I hook most computers to my local network and then go to
https://fast.com I generally see speeds between 900Mps and 1Gbs. Very nice!
If I unhook a cable that was plugged into a computer that showed the speed I mention above and then hook the cable to my RP4 I and go to https://fast.com on either Firefox or Chromium I generally see speeds between 100Mbs and 150Mbs. Nice, but not as nice as I'd expect.
Running ethtool shows that the interface is Speed: 1000Mb/s Duplex: Full
Running ifconfig shows
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.1.18 netmask 255.255.255.0 broadcast 192.168.1.255
inet6 fe80::f3f2:dc5e:d520:3749 prefixlen 64 scopeid 0x20<link>
ether dc:a6:32:b8:b0:be txqueuelen 1000 (Ethernet)
RX packets 1169364 bytes 1749144596 (1.6 GiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 138931 bytes 11124996 (10.6 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
The system seems quite fast, and 150Mbs is certainly respectable. But, I wonder what's going on here. I did some Googling and a bunch of people are having similar problems which they attribute to the way the Gigabit ethernet adapter is connected using the USB3 channel.
What's the latest thinking about this problem?