Advertise SRv6 Locator Information by IPv6 Neighbor Discovery

In an SRv6 network, each SRv6 segment endpoint has at least one SRv6 Locator. Through the SRv6 locator routes, other SRv6 segment nodes can steer traffic to that node. This document describes a method for an SRv6 endpoint (e.g., a host or a customer provider edge (CPE)) to advertise its SRv6 locator to a neighboring SRv6-aware router using extensions to the IPv6 Neighbor Discovery (ND) protocol. This approach eliminates the need to run a full routing protocol stack on simple endpoints, facilitating SRv6 deployment in controlled, trusted domains such as data centers and managed access networks.