From virtual SDN routing to a diskless mini PC router
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routerd is built for an unusually wide deployment spectrum.
At one end, it can route between virtual SDN or VNET segments in a lab. At the other end, it can boot a small physical mini PC from a live ISO, save its configuration on USB, buffer logs in RAM, and become a persistent home router without installing an operating system to an internal disk.
That range is the point. Real routers are not just packet forwarding. They are DHCP, DNS, prefix delegation, tunnels, NAT, firewall policy, health checks, logs, service units, sysctl values, and recovery behavior. routerd keeps those parts in one typed resource graph.
