I like to rename my interfaces so they're intuitive to me.
ugen6.2: <TP-LINK USB 10/100/1000 LAN> at usbus6
ure0 on uhub0
ure0: <TP-LINK USB 10/100/1000 LAN, class 0/0, rev 2.10/30.00, addr 2> on usbus6
miibus1: <MII bus> on ure0
rgephy1: <RTL8251/8153 1000BASE-T media interface> PHY 0 on miibus1
rgephy1: none, 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, 1000baseT-FDX, 1000baseT-FDX-master, auto
ue0: <USB Ethernet> on ure0
ue0: Ethernet address: <OMITTED>
ue0: link state changed to DOWN
ue0: changing name to 'wan'
wan: link state changed to UP
wan: link state changed to DOWN
wan: link state changed to UP
wan: link state changed to DOWN
wan: link state changed to UP
Changing the config to 1 caused the device to disappear ...