Quick-Start for the Datagram Congestion Control Protocol (DCCP)
RFC 5634
Document | Type | RFC - Experimental (August 2009; No errata) | |
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Authors | Gorry Fairhurst , Arjuna Sathiaseelan | ||
Last updated | 2015-10-14 | ||
Replaces | draft-fairhurst-tsvwg-dccp-qs | ||
Stream | Internet Engineering Task Force (IETF) | ||
Formats | plain text html pdf htmlized (tools) htmlized bibtex | ||
Stream | WG state | (None) | |
Document shepherd | No shepherd assigned | ||
IESG | IESG state | RFC 5634 (Experimental) | |
Action Holders |
(None)
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Consensus Boilerplate | Unknown | ||
Telechat date | |||
Responsible AD | Lars Eggert | ||
Send notices to | (None) |
Network Working Group G. Fairhurst Request for Comments: 5634 A. Sathiaseelan Category: Experimental University of Aberdeen August 2009 Quick-Start for the Datagram Congestion Control Protocol (DCCP) Abstract This document specifies the use of the Quick-Start mechanism by the Datagram Congestion Control Protocol (DCCP). DCCP is a transport protocol that allows the transmission of congestion-controlled, unreliable datagrams. DCCP is intended for applications such as streaming media, Internet telephony, and online games. In DCCP, an application has a choice of congestion control mechanisms, each specified by a Congestion Control Identifier (CCID). This document specifies general procedures applicable to all DCCP CCIDs and specific procedures for the use of Quick-Start with DCCP CCID 2, CCID 3, and CCID 4. Quick-Start enables a DCCP sender to cooperate with Quick-Start routers along the end-to-end path to determine an allowed sending rate at the start of a connection and, at times, in the middle of a DCCP connection (e.g., after an idle or application- limited period). The present specification is provided for use in controlled environments, and not as a mechanism that would be intended or appropriate for ubiquitous deployment in the global Internet. Status of This Memo This memo defines an Experimental Protocol for the Internet community. It does not specify an Internet standard of any kind. Discussion and suggestions for improvement are requested. Distribution of this memo is unlimited. Copyright Notice Copyright (c) 2009 IETF Trust and the persons identified as the document authors. All rights reserved. This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents in effect on the date of publication of this document (http://trustee.ietf.org/license-info). Please review these documents carefully, as they describe your rights and restrictions with respect to this document. Fairhurst & Sathiaseelan Experimental [Page 1] RFC 5634 Quick-Start for DCCP August 2009 This document may contain material from IETF Documents or IETF Contributions published or made publicly available before November 10, 2008. The person(s) controlling the copyright in some of this material may not have granted the IETF Trust the right to allow modifications of such material outside the IETF Standards Process. Without obtaining an adequate license from the person(s) controlling the copyright in such materials, this document may not be modified outside the IETF Standards Process, and derivative works of it may not be created outside the IETF Standards Process, except to format it for publication as an RFC or to translate it into languages other than English. Table of Contents 1. Introduction ....................................................3 1.1. Terminology ................................................4 2. Quick-Start for DCCP ............................................5 2.1. Sending a Quick-Start Request for a DCCP Flow ..............5 2.1.1. The Quick-Start Interval ............................5 2.2. Receiving a Quick-Start Request for a DCCP Flow ............6 2.2.1. The Quick-Start Response Option .....................7 2.3. Receiving a Quick-Start Response ...........................8 2.3.1. The Quick-Start Mode ................................8 2.3.2. The Quick-Start Validation Phase ....................9 2.4. Procedure When No Response to a Quick-Start Request .......10 2.5. Procedure When a Packet Is Dropped While Using Quick-Start ...............................................11 2.6. Interactions with Mobility and Signaled Path Changes ......11 2.7. Interactions with Path MTU Discovery ......................12 2.8. Interactions with Middleboxes .............................12 3. Mechanisms for Specific CCIDs ..................................13 3.1. Quick-Start for CCID 2 ....................................13 3.1.1. The Quick-Start Request for CCID 2 .................13 3.1.2. Sending a Quick-Start Response with CCID 2 .........13 3.1.3. Using the Quick-Start Response with CCID 2 .........13 3.1.4. Quick-Start Validation Phase for CCID 2 ............14 3.1.5. Reported Loss or Congestion While Using Quick-Start ........................................14 3.1.6. CCID 2 Feedback Traffic on the Reverse Path ........15 3.2. Quick-Start for CCID 3 ....................................15 3.2.1. The Quick-Start Request for CCID 3 .................15Show full document text