This document introduces Hierarchical Mobile IPv6 (HMIPv6), a protocol that enhances Mobile IPv6 by introducing a new node called the Mobility Anchor Point (MAP). HMIPv6 reduces the amount of signaling between the Mobile Node (MN), its Correspondent Nodes (CNs), and its Home Agent (HA) by allowing the MN to send Binding Updates (BUs) to the local MAP instead of the HA or CNs. The MAP acts as a local HA, enabling efficient mobility management and reducing the number of messages sent over the air interface. HMIPv6 also supports Fast Mobile IPv6 Handovers, allowing seamless mobility for MNs. The MAP helps in reducing the number of round-trip times needed for signaling, improving performance and reducing delays during handovers. The MAP is located at any level in a hierarchical network of routers, including the Access Router (AR). The MAP is not required on each subnet, and it limits the amount of Mobile IPv6 signaling outside the local domain. The MAP provides a solution to the issues of signaling delays and improves the performance of Mobile IPv6. The document outlines the terminology, overview of HMIPv6, mobile IPv6 extensions, neighbor discovery extension, protocol operation, and security considerations. It also discusses MAP discovery, updating previous MAPs, and the selection of MAPs by the mobile node. The document defines the MAP option message format, the process of MAP discovery, and the operations of the MAP, HA, MN, and CN. The document also includes IANA considerations and security considerations for HMIPv6. The document is an experimental protocol for the Internet community and does not specify an Internet standard.This document introduces Hierarchical Mobile IPv6 (HMIPv6), a protocol that enhances Mobile IPv6 by introducing a new node called the Mobility Anchor Point (MAP). HMIPv6 reduces the amount of signaling between the Mobile Node (MN), its Correspondent Nodes (CNs), and its Home Agent (HA) by allowing the MN to send Binding Updates (BUs) to the local MAP instead of the HA or CNs. The MAP acts as a local HA, enabling efficient mobility management and reducing the number of messages sent over the air interface. HMIPv6 also supports Fast Mobile IPv6 Handovers, allowing seamless mobility for MNs. The MAP helps in reducing the number of round-trip times needed for signaling, improving performance and reducing delays during handovers. The MAP is located at any level in a hierarchical network of routers, including the Access Router (AR). The MAP is not required on each subnet, and it limits the amount of Mobile IPv6 signaling outside the local domain. The MAP provides a solution to the issues of signaling delays and improves the performance of Mobile IPv6. The document outlines the terminology, overview of HMIPv6, mobile IPv6 extensions, neighbor discovery extension, protocol operation, and security considerations. It also discusses MAP discovery, updating previous MAPs, and the selection of MAPs by the mobile node. The document defines the MAP option message format, the process of MAP discovery, and the operations of the MAP, HA, MN, and CN. The document also includes IANA considerations and security considerations for HMIPv6. The document is an experimental protocol for the Internet community and does not specify an Internet standard.