Mobile IP Protocols???

Mobile IP Protocols

Mobile IP, as proposed by the Internet Engineering Task Force (IETF) in RFC 2002  and subsequent RFCs, provides an efficient, scalable mechanism for node mobility within the Internet. Nodes may move and change their point of attachment to the Internet without changing their IP address. This allows them to maintain transport and higher-layer connections while moving

Mobile IP New Architectural Entities

Mobile IP introduces three new functional entities:

1. Mobile Node. A host or router that changes its point of attachment from one network or subnetwork to another. A mobile node may change its location without changing its IP address; it may continue to communicate with other Internet nodes at any location using its (constant) IP address, assuming link layer connectivity to a point of attachment is available.
2. Home Agent. A router on a mobile node’s home network that tunnels datagrams for delivery to the mobile node when it is away from home, and maintains current location
information for the mobile node.
3. Foreign Agent. A router on a mobile node’s visited network that provides routing services to the mobile node while registered. The foreign agent detunnels and delivers
datagrams to the mobile node that were tunneled by the mobile node’s home agent. For datagrams sent by a mobile node, the foreign agent may serve as a default router for registered mobile nodes.