Port Management To Reduce Logging In Large-Scale NATs

The information below is for an old version of the document
Document Type Expired Internet-Draft (individual)
Authors Tina Tsou  , Weibo Li  , Tom Taylor  , Jing Huang 
Last updated 2015-04-24 (latest revision 2013-07-02)
Stream ISE
Intended RFC status Informational
Expired & archived
pdf htmlized (tools) htmlized bibtex
IETF conflict review conflict-review-tsou-behave-natx4-log-reduction
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Stream ISE state Response to Review Needed
Revised I-D Needed
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IESG IESG state Expired
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


Various IPv6 transition strategies require the introduction of large- scale NATs (e.g. AFTR, NAT64) to share the limited supply of IPv4 addresses available in the network until transition is complete. There has recently been debate over how to manage the sharing of ports between different subscribers sharing the same IPv4 address. One factor in the discussion is the operational requirement to log the assignment of transport addresses to subscribers. It has been argued that dynamic assignment of individual ports between subscribers requires the generation of an excessive volume of logs. This document suggests a way to achieve dynamic port sharing while keeping log volumes low.


Tina Tsou (tina.tsou.zouting@huawei.com)
Weibo Li (mweiboli@gmail.com)
Tom Taylor (tom.taylor.stds@gmail.com)
Jing Huang (james.huang@huawei.com)

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