This document introduces the Hierarchical Mobile IPv6 (HMIPv6) protocol, which extends Mobile IPv6 and IPv6 Neighbour Discovery to enhance local mobility handling. The key innovation is the introduction of a Mobility Anchor Point (MAP), which acts as a local Home Agent within a visited network. This allows mobile nodes to send Binding Updates (BUs) to the MAP instead of the Home Agent (HA) and Correspondent Nodes (CNs), reducing the number of signaling messages and improving handover speed. The MAP can be located at any level in the network, including the Access Router (AR), and supports dynamic and static hierarchies. The document details the operation of HMIPv6, including the addition of a new flag (M) in Binding Updates, the MAP Option in IPv6 Neighbour Discovery, and the security considerations for the mobile node-MAP, mobile node-Correspondent Node, and mobile node-HA relationships. It also covers MAP discovery, MAP selection, and recovery from MAP failures. The goal is to provide seamless mobility while minimizing the impact on existing protocols and improving performance.This document introduces the Hierarchical Mobile IPv6 (HMIPv6) protocol, which extends Mobile IPv6 and IPv6 Neighbour Discovery to enhance local mobility handling. The key innovation is the introduction of a Mobility Anchor Point (MAP), which acts as a local Home Agent within a visited network. This allows mobile nodes to send Binding Updates (BUs) to the MAP instead of the Home Agent (HA) and Correspondent Nodes (CNs), reducing the number of signaling messages and improving handover speed. The MAP can be located at any level in the network, including the Access Router (AR), and supports dynamic and static hierarchies. The document details the operation of HMIPv6, including the addition of a new flag (M) in Binding Updates, the MAP Option in IPv6 Neighbour Discovery, and the security considerations for the mobile node-MAP, mobile node-Correspondent Node, and mobile node-HA relationships. It also covers MAP discovery, MAP selection, and recovery from MAP failures. The goal is to provide seamless mobility while minimizing the impact on existing protocols and improving performance.