Dynamic Allocation of Shared IPv4 Addresses

Document Type Replaced Internet-Draft (dhc WG)
Last updated 2014-03-12 (latest revision 2014-02-14)
Replaces draft-farrer-dhc-shared-address-lease, draft-sun-dhc-port-set-option
Replaced by draft-ietf-dhc-dynamic-shared-v4allocation
Stream IETF
Intended RFC status (None)
Expired & archived
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Stream WG state Adopted by a WG
Document shepherd No shepherd assigned
IESG IESG state Replaced by draft-ietf-dhc-dynamic-shared-v4allocation
Consensus Boilerplate Unknown
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Responsible AD (None)
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


This memo describes the dynamic allocation of shared IPv4 addresses to clients using the DHCPv4 protocol. Address sharing allows a single IPv4 address to be allocated to multiple, active clients simultaneously, each client being differentiated by a unique set of L4 source ports. The changes necessary to existing DHCPv4 client and server behaviour are described and a new DHCPv4 option for provisioning clients with shared IPv4 addresses is included. Due to the nature of sharing IP addresses, there are necessarily some limitations to the applicability. This memo describes those limitations and recommends suitable architectures and technologies where address sharing may be utilized.


Yong Cui (yong@csnet1.cs.tsinghua.edu.cn)
Qiong Sun (sunqiong@ctbri.com.cn)
Ian Farrer (ian.farrer@telekom.de)
Yiu Lee (yiu_lee@cable.comcast.com)
Qi Sun (sunqi@csnet1.cs.tsinghua.edu.cn)
Mohamed Boucadair (mohamed.boucadair@orange.com)

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