datatracker.ietf.org
Sign in
Version 5.6.3.p2, 2014-09-29
Report a bug

A Mechanism for Session Initiation Protocol (SIP) Avalanche Restart Overload Control
draft-shen-soc-avalanche-restart-overload-07

Document type: Expired Internet-Draft (individual)
Document stream: No stream defined
Last updated: 2014-08-14 (latest revision 2014-02-10)
Intended RFC status: Unknown
Other versions: (expired, archived): plain text, pdf, html

Stream State:No stream defined
Document shepherd: No shepherd assigned

IESG State: Expired
Responsible AD: (None)
Send notices to: No addresses provided

This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found here:
http://www.ietf.org/archive/id/draft-shen-soc-avalanche-restart-overload-07.txt

Abstract

When a large number of clients register with a SIP registrar server at approximately the same time, the server may become overloaded. Near-simultaneous floods of SIP SUBSCRIBE and PUBLISH requests may have similar effects. Such request avalanches can occur, for example, after a power failure and recovery in a metropolitan area. This document describes how to avoid such overload situations. Under this mechanism, a server estimates an avalanche restart backoff interval during its normal operation and conveys this interval to its clients through a new Restart-Timer header in normal response messages. Once an avalanche restart actually occurs, the clients perform backoff based on the previously received Restart-Timer header value before sending out the first request attempt. Thus, the mechanism spreads all the initial client requests and prevents them from overloading the server.

Authors

Charles Shen <charles@cs.columbia.edu>
Henning Schulzrinne <hgs@cs.columbia.edu>
Arata Koike <koike.arata@lab.ntt.co.jp>

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