The IESG has approved the following document: - 'Requirements for Management of Overload in the Session Initiation Protocol ' <draft-ietf-sipping-overload-reqs-05.txt> as an Informational RFC This document is the product of the Session Initiation Proposal Investigation Working Group. The IESG contact persons are Jon Peterson and Cullen Jennings. A URL of this Internet-Draft is: http://www.ietf.org/internet-drafts/draft-ietf-sipping-overload-reqs-05.txt Technical Summary Overload occurs in Session Initiation Protocol (SIP) networks when proxies and user agents have insuffient resources to complete the processing of a request. SIP provides limited support for overload handling through its 503 response code, which tells an upstream element that it is overloaded. However, numerous problems have been identified with this mechanism. This draft summarizes the problems with the existing 503 mechanism, and provides some requirements for a solution. Working Group Summary The SIPPING WG supports the development and advancement of this document. Document Quality This document defines no new protocol elements. The document has been thoroughly reviewed by members of the SIPPING WG and members of the design team working on modeling and simulations for SIP overload. Personnel Jon Peterson reviewed this document for the IESG. Mary Barnes in the document shepherd. RFC Editor Note In the Security Considerations, please append the following paragraph: Any mechanism that improves the behavior of SIP elements under load will result in more predictable performance in the face of application-layer denial-of-service attacks. _______________________________________________ IETF-Announce@ietf.org https://www.ietf.org/mailman/listinfo/ietf-announce
