Considerations on the IPv6 Host density Metric

Document Type Expired Internet-Draft (individual)
Author Geoff Huston 
Last updated 2005-02-11
Stream (None)
Intended RFC status (None)
Expired & archived
pdf htmlized (tools) htmlized bibtex
Stream Stream state (No stream defined)
Consensus Boilerplate Unknown
RFC Editor Note (None)
IESG IESG state Expired
Telechat date
Responsible AD (None)
Send notices to (None)

This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


This memo provides an analysis of the Host Density metric as currently used to guide registry allocations of IPv6 unicast address blocks. This document contrasts the address efficiency as currently adopted in the allocation of IPv4 network addresses and that used by the IPv6 protocol. It is noted that for large allocations there are very significant variations in the target efficiency metric between the two approaches. The memo notes that the IPv6 address assignment efficiency metric would benefit from a detailed technical review, particularly relating to large scale deployments of public infrastructure.


Geoff Huston (

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