Will have to look at kea and corerad. What hardware do you use for the wireless links? Intel has been very hit or miss in my experience. And the misses suuuck, like after enough hosts connect, you get kernel panic on every new client connection, or all but the one device I needed a separate wlan for are compatible with the host. So, NixOS on a router that doesn’t have to be a wifi ap is extremely nice in my experience.

For wireless I started with the PC Engines miniPCI cards, but moved to a seperate AP for wifi6, and because hostapd was not fun.

https://openwrt.org/toh/tp-link/eap615-wall is the device I use as an AP, which runs OpenWRT.

I also have a separate AP with OpenWRT (UniFi with OpenWRT).

Running a router built with systemd-networkd and kea myself, and I quite like both, even though I have not integrated them with each other. Would you be willing to share some details on how you use these components? Especially corerad as I am not familiar with it and wonder on the why+how, considering networkd does NDP. Thanks

systemd-networkd sets up a LAN interface, which Kea then serves DHCP for.

CoreRAD is about the same thing, but for NDP instead of DHCP.

I could have used systemd-networkd for serving DHCP and NDP, but prefer to use separate modular privilege-separated deamons, especially if I get memory safety too.

Just saying, I'd be interested in a blog post if either of you did one.