> The problem is then how does the network know where my IP address is. When a packet aims at my loopback, how does it work its way to me?

Mobile IP:

> The basic idea behind the separation is that the Internet architecture combines two functions, routing locators (where a client is attached to the network) and identifiers (who the client is) in one number space: the IP address. LISP supports the separation of the IPv4 and IPv6 address space following a network-based map-and-encapsulate scheme (RFC 1955). In LISP, both identifiers and locators can be IP addresses or arbitrary elements like a set of GPS coordinates or a MAC address.[2]

* https://en.wikipedia.org/wiki/Locator/Identifier_Separation_...