The IESG has approved the following document: - 'SACK-IMMEDIATELY Extension for the Stream Control Transmission Protocol' (draft-ietf-tsvwg-sctp-sack-immediately-04.txt) as Proposed Standard This document is the product of the Transport Area Working Group. The IESG contact persons are Spencer Dawkins and Martin Stiemerling. A URL of this Internet Draft is: http://datatracker.ietf.org/doc/draft-ietf-tsvwg-sctp-sack-immediately/ Technical Summary This document updates RFC 4960 by defining a method for the sender of a DATA chunk to indicate that the corresponding SACK chunk should be sent back immediately and not be delayed. It is done by specifying a bit in the DATA chunk header, called the I-bit, which can get set either by the SCTP implementation or by the application using an SCTP stack. Since unknown flags in chunk headers are ignored by SCTP implementations, this extension does not introduce any interoperability problems. Working Group Summary There was consensus to adopt this as a WG document, review by the WG, and agreement by the WG to finally publish this. Document Quality This document is seen as ready to publish. FreeBSD supports this extension since FreeBSD 7.2, released May 2009. The Linux kernel supports it also (accessibility by the user was added recently to netinet/sctp.h). Personnel The document shepherd is: Gorry Fairhurst, <gorry@erg.abdn.ac.uk>. The responsible AD is: Spencer Dawkins <spencerdawkins.ietf@gmail.com>
