Multiple Home Agent Placement Considerations Based on Internet Service Provider Perspective in MobileIPv6

To overcome MobileIPv6's natural centrality driven single point of failure and redundant routing due to central Home Agent in home network, Global HAHA introduced an overlay of scattered multiple HAs. Placements of secondary HAs were not addressed by major work in existence. This paper analyses placements in ISP's viewpoint at AS level. Freeman's closeness index and betweenness are used in categorizing examined AS level topology of 30, 000 nodes. 30, 000 different random communications were analyzed which substantiated that Freeman's closeness describes topological locations better. Results show that categories having highest, medium indices are tend to hold better performance only when combined with an HA of lowest category. Lowest category shows best performance with the highest category.