Inter Home Agents Protocol (HAHA)

Document Type Expired Internet-Draft (individual)
Authors Ryuji Wakikawa  , Vijay Devarapalli  , Pascal Thubert 
Last updated 2004-02-16
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


This document describes an inter Home Agents (HAHA) protocol to provide multiple Home Agents support for both Mobile IPv6 and the Nemo Basic Support protocol. The HAHA protocol provides Home Agent redundancy and load-balancing for both protocols. The HAHA protocol allows multiple Home Agents to be placed at different links. It also allows a Mobile Node/Router to utilize multiple Home Agents simultaneously. The protocol consists of 3 mechanisms, Home Agent List management, Binding Synchronization, and Home Agent Switching. A Mobile Node/Router picks one Home Agent as its primary Home Agent and registers with it. The primary Home Agent synchronizes the binding cache information with other Home Agents. Any of Home Agents can intercept a packet meant for the Mobile Node/Router and tunnel the packet directly to its current Care-of address. Alternatively, the Home Agent can tunnel the packet to the primary Home Agent.


Ryuji Wakikawa (
Vijay Devarapalli (
Pascal Thubert (

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)