[Node]

Generally - how to set that wifi should have priority for wifi for internet? Because if i want to prioritise the LAN, i will just disconnect from wifi - simple.

And another information which i forget to add. I was affraid to change Metric about ethernet/wifi adapter settings. Because i need it also for best quality connection to car to have it stable and 100percent reliability of connection when flashing ecus through ICOM. I dont want to mess omething to have unstable and weak connection. I dont want that flashing will be disrupted. I was studing IT 10years back, but i forgot lot of it and network is one of my weak points. So i dont know what is metric exactly for.

Metric is used for ONE thing only - select which interface has priority. Nothing to do with connection stability or anything else. It's like a "cost" of transmitting a packet over the specified interface. TCPIP layer is programmed to look for lowest cost interface. Normally hardwired interfaces have same or lower metric. In your case my feeling is you either need to increase the metric for LAN or decrease for WiFi.

That won't impact ICOM connection at all IF all other network parameters are CORRECT - ip addresses/netmasks not overlapping, etc. Because packets will be sent to ICOM to it's IP directly. Default route is only used when no other route matches the destination.

But IF you want to change a metric number for only one interface you need to know what number is assigned to them now. And that depends on network card drivers too. Hence that command.

Alternatively, you could just set metric for BOTH interfaces making sure you set a smaller number for WiFi.

BUT FRANKLY, just connect a router or a switch between ICOM and computer and use SAME interface for BOTH internet and car... Much easier and less hassle.