That would be in Routing and Remote Access Services (RRAS). But unfortunately that service doesn't exist in W2KP - only server.

While the GUI tools for controlling the RRAS doesn't exist on Win2kPro the service itself does. It looks like I can restore routing after it fails by manually forcing the RRAS service to start. So that saves me having to restart the box when the routing fails.

I will probably change the RRAS service from "auto" to "manual" and have it always started at boot. Hopefully that might stop routing from going away in the first place.