Support for Linksys E2500 V4

You set them yourself.

It's better/safer to have them isolated, using static IP on the TFTP host, but hosting the TFTP on an existing network works as well.

You set them yourself

How? My current setup is the network cable connected from one of the router's 'non internet' cables to my pc's ethernet port. I have a TFTP server running on my pc with no firewall and have confirmed through local client that I am able to download the kernel image from it. However, when I do option 1 in the bootloader I keep getting timeouts. During this time my pc states that I am not connected to any network via ethernet. I think the issue is the ip addresses that I am setting, or the configuration of the network cable.

Ok lmao the issue was i had DHCP enabled for my ethernet interface. Setting the IP address manually to the one I set an env variable to instantly worked. Thank you for the support!

I made a tutorial on installing to this model here