1Gbps packet forwarding

Hey there,

I’m trying to get the default ubuntu OS to forward packet at 1Gbps between the default eth0 to an USB-to-Ethernet adapter (USB 3.0, 1Gbps). I’m consistently getting around 90Mbps using speed test. When I am direct connected I was able to get around 200Mbps or more. I’m wondering if there’s any bus limitation here? is the USB 3.0 really capable of 5gbps?

mii-tool eth0
eth0: negotiated 1000baseT-FD flow-control, link ok

mii-tool eth1
eth1: negotiated 1000baseT-FD flow-control, link ok

[ 9.487329] r8152 2-1.4:1.0 eth1: v2.09.00 (2017/08/21)
[ 9.487345] r8152 2-1.4:1.0 eth1: This product is covered by one or more of the following patents:
US6,570,884, US6,115,776, and US6,327,625.

Thanks a lot for opening this channel with consumers!

best,

Martins

Could you share your test command?

that’s ok, I was using an old 2.0 usb dongle. It got better with a new 3.0. Sorry about that.