LAN ure interface problem

From: Ludovit Koren <>
Date: Fri, 22 Oct 2021 14:00:02 UTC

I have installed FreeBSD 14.0-CURRENT #1 main-n250134-225639e7db6-dirty
on my notebook HP EliteBook 830 G7 and I am using RealTek usb LAN

ure0 on uhub0
ure0: <Realtek USB 10/100/1000 LAN, class 0/0, rev 3.00/30.00, addr 1> on usbus1
miibus0: <MII bus> on ure0
rgephy0: <RTL8251/8153 1000BASE-T media interface> PHY 0 on miibus0
rgephy0: OUI 0x00e04c, model 0x0000, rev. 0
rgephy0:  none, 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, 1000baseT-FDX, 1000baseT-FDX-master, auto
ue0: <USB Ethernet> on ure0
ue0: bpf attached
ue0: Ethernet address: 00:e0:4c:68:04:20

When there is bigger load on the interface, for example rsync of the big
directory, the carrier is lost. The only solution I found is to remove
and insert the usb interface; ifconfig ue0 down, ifconfig ue0 up did not
help. The output of the ifconfig:

ue0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
        ether 00:e0:4c:68:04:20
        inet netmask 0xffffff00 broadcast
        media: Ethernet autoselect (100baseTX <full-duplex>)
        status: active

I do not know and did not find anything relevant, if the driver is buggy
or the hardware has some problems. Please, advice.