The IESG has received a request from the TCP Maintenance and Minor Extensions WG (tcpm) to consider the following document: - 'Increasing TCP's Initial Window' <draft-ietf-tcpm-initcwnd-06.txt> as Experimental RFC The IESG plans to make a decision in the next few weeks, and solicits final comments on this action. Please send substantive comments to the ietf@ietf.org mailing lists by 2012-12-10. Exceptionally, comments may be sent to iesg@ietf.org instead. In either case, please retain the beginning of the Subject line to allow automated sorting. Abstract This document proposes an experiment to increase the permitted TCP initial window (IW) from between 2 and 4 segments, as specified in RFC 3390, to 10 segments, with a fallback to the existing recommendation when performance issues are detected. It discusses the motivation behind the increase, the advantages and disadvantages of the higher initial window, and presents results from several large scale experiments showing that the higher initial window improves the overall performance of many web services without resulting in a congestion collapse. The document closes with a discussion of usage and deployment for further experimental purpose recommended by the IETF TCP Maintenance and Minor Extensions (TCPM) working group. The file can be obtained via http://datatracker.ietf.org/doc/draft-ietf-tcpm-initcwnd/ IESG discussion can be tracked via http://datatracker.ietf.org/doc/draft-ietf-tcpm-initcwnd/ballot/ No IPR declarations have been submitted directly on this I-D.