Hey r/networking. Previously searched Google, forums, and the sub for this but haven't gotten any decent answers.
Say you have a device that's unable to set its own IP address. This device also uses Bonjour for discovery. When connected to the LAN that does not have a DHCP server on the subnet (or say the VLAN/LAN it's on is airgapped) it defaults to the link-local address, 169.etc.etc. I'm not a professional network engineer but I'd like to think I know a thing or two. This hypothetical situation brought up the following question that I haven't been able to find a sufficient answer for. What exactly on the hardware or software side is required to program an IP address internally on a device? Obviously if there's a DHCP server the device gets it from that. Windows and most OS's let you set it via a GUI or command line. But what if the device has a VERY simple NIC that there's no way to set the IP, at least that I'm aware of? What's lacking or missing?
Been driving me crazy as normally I can find an answer but no luck this time. Thanks in advance!
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