Session Initiation Protocol (SIP) Overload Control

Document Type Replaced Internet-Draft (individual)
Authors Henning Schulzrinne  , Volker Hilt  , Vijay Gurbani 
Last updated 2010-11-19 (latest revision 2010-08-23)
Replaces draft-hilt-sipping-overload
Replaced by RFC 7339
Stream (None)
Intended RFC status (None)
Expired & archived
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Stream Stream state (No stream defined)
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IESG IESG state Replaced by draft-ietf-soc-overload-control
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


Overload occurs in Session Initiation Protocol (SIP) networks when SIP servers have insufficient resources to handle all SIP messages they receive. Even though the SIP protocol provides a limited overload control mechanism through its 503 (Service Unavailable) response code, SIP servers are still vulnerable to overload. This document defines an overload control mechanism for SIP.


Henning Schulzrinne (
Volker Hilt (
Vijay Gurbani (

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