@Kevin_Z yes USB dongle is connected to router via cable, when shutdown macbook still plugged in charger, so the USB-C dongle could still get power. by the way sometimes the DHCP server doesnt...

Router using default settings. hangs when I shutdown my macbook with usb ethernet dongle connected to LAN. other wire and wireless users cannot go to internet, cannot connect to 192.168.0.1 , only...