
126 Part Two • IPv6 Protocols
The ISP community dislikes geographic-based allocations because it means
significantly more complexity (and cost) to manage geographic address
allocation. Since most objections to provider-based allocation grew out of
difficulties of configuring and reconfiguring nodes with provider-based
addresses, geographic address allocation has been dropped in favor of
developing improved automatic and dynamic host configuration under
IPv6—including the ability to automatically renumber entire networks
when providers are changed.
7.1.3 IPV6AGGREGATION
With the goal of avoiding complicating the IPv6 routing tables, the cur-
rent approach