USB modem modules

I found, that there are several options to setup internet connection over USB: Use cdc_acm mode and transfer data using PPP protocol Use cdc_ncm mode. System will setup wwan network interface. Also it will provide serial interfaces, which I can use for sending AT commands, for example. Use cdc_ether mode, which setup ether network interface.…

How to prevent the route with metric 0 to be created

My PC has two NICs,ethernet and wifi. I wnat to set higher metric to wifi NIC. I use systemd-networkd. $ cat /etc/systemd/network/10-wired.network [Match] Name=enp0s25 [Network] Address=192.168.3.102/24 Gateway=192.168.3.1 DNS=192.168.3.1 $ cat /etc/systemd/network/20-wireless.network [Match] Name=wlp2s0 [Network] Address=192.168.3.103/24 DNS=192.168.3.1 [Route] Gateway=0.0.0.0 Destination=192.168.3.0/24 Metric=200 [Route] Gateway=192.168.3.1 Destination=0.0.0.0/0 Metric=200 After reboot, $ route Kernel IP routing table Destination Gateway Genmask…