This document specifies an Internet standards track protocol for transparent routing of IP datagrams to mobile nodes. Each mobile node is identified by its home address, regardless of its current attachment point. When away from its home network, a mobile node is associated with a care-of address, which provides information about its current attachment point. The protocol allows the mobile node to register this care-of address with a home agent, which then tunnels datagrams destined for the mobile node through a tunnel to the care-of address. After arriving at the end of the tunnel, the datagram is delivered to the mobile node. The document outlines the protocol requirements, goals, assumptions, and applicability. It introduces new architectural entities such as mobile nodes, home agents, and foreign agents. The protocol supports agent discovery, registration, and various routing considerations. It also includes security considerations and message formats for control messages. The document provides detailed specifications for agent advertisement, agent solicitation, registration, and other relevant procedures.This document specifies an Internet standards track protocol for transparent routing of IP datagrams to mobile nodes. Each mobile node is identified by its home address, regardless of its current attachment point. When away from its home network, a mobile node is associated with a care-of address, which provides information about its current attachment point. The protocol allows the mobile node to register this care-of address with a home agent, which then tunnels datagrams destined for the mobile node through a tunnel to the care-of address. After arriving at the end of the tunnel, the datagram is delivered to the mobile node. The document outlines the protocol requirements, goals, assumptions, and applicability. It introduces new architectural entities such as mobile nodes, home agents, and foreign agents. The protocol supports agent discovery, registration, and various routing considerations. It also includes security considerations and message formats for control messages. The document provides detailed specifications for agent advertisement, agent solicitation, registration, and other relevant procedures.