Deployment Considerations for Lightweight 4over6

Document Type Expired Internet-Draft (softwire WG)
Authors Qiong Sun  , Chongfeng Xie  , Yiu Lee  , Maoke Chen  , Tianxiang Li  , Ian Farrer 
Last updated 2018-01-04 (latest revision 2017-07-03)
Stream Internet Engineering Task Force (IETF)
Intended RFC status (None)
Expired & archived
pdf htmlized bibtex
Stream WG state WG Document
Document shepherd No shepherd assigned
IESG IESG state Expired
Consensus Boilerplate Unknown
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


Lightweight 4over6 is a mechanism for providing IPv4 services to clients connected to a single-stack IPv6 network. The architecture is similar to DS-Lite, but the network address translation function is relocated from the tunnel concentrator to the tunnel client, hence reducing the amount of state which must be maintained in the concentrator to a per-customer level. This document discusses the applicability, describes various deployment models and provides deployment considerations for Lightweight 4over6.


Qiong Sun (
Chongfeng Xie (
Yiu Lee (
Maoke Chen (
Tianxiang Li (
Ian Farrer (

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