If you have multiple ethernet ports, Unraid might try to "bond" them. If you only have one cable plugged in, disabling bonding in Network Settings often improves stability.
Safely eject the USB, plug it back into your Unraid server, and power it on. Unraid will automatically recreate these files using DHCP defaults . Method 2: Reset via Local Terminal unraid reset network settings
To reconfigure your network settings:
Reset Network to default - General Support - Forums - Unraid If you have multiple ethernet ports, Unraid might
(This removes all manual network settings. On next boot, Unraid defaults to DHCP.) If you have multiple ethernet ports