[rfc-dist] RFC 4411 on Extending the Session Initiation Protocol (SIP) Reason Header for Preemption Events

rfc-editor@rfc-editor.org rfc-editor at rfc-editor.org
Mon Feb 27 13:02:06 PST 2006

A new Request for Comments is now available in online RFC libraries.

        RFC 4411

        Title:      Extending the Session Initiation Protocol 
                    (SIP) Reason Header for Preemption Events 
        Author:     J. Polk
        Status:     Standards Track
        Date:       February 2006
        Mailbox:    jmpolk at cisco.com
        Pages:      22
        Characters: 49260
        Updates/Obsoletes/SeeAlso:   None

        I-D Tag:    draft-ietf-sipping-reason-header-for-preemption-04.txt

        URL:        http://www.rfc-editor.org/rfc/rfc4411.txt

This document proposes an IANA Registration extension to the Session
Initiation Protocol (SIP) Reason Header to be included in a BYE Method
Request as a result of a session preemption event, either at a user
agent (UA), or somewhere in the network involving a reservation-based
protocol such as the Resource ReSerVation Protocol (RSVP) or Next
Steps in Signaling (NSIS).  This document does not attempt to address
routers failing in the packet path; instead, it addresses a deliberate
tear down of a flow between UAs, and informs the terminated UA(s) with
an indication of what occurred.  [STANDARDS TRACK]

This document is a product of the Session Initiation Protocol
Working Group of the IETF.

This is now a Proposed Standard Protocol.

STANDARDS TRACK: This document specifies an Internet standards track
protocol for the Internet community,and requests discussion and 
suggestions for improvements.Please refer to the current edition of the 
Internet Official Protocol Standards (STD 1) for the standardization 
state and status of this protocol.  Distribution of this memo is 

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