I-D ACTION:draft-duker-as2-reliability-00.txt

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	Title		: Operational Reliability for EDIINT AS2 
	Author(s)	: J. Duker, D. Moberg
	Filename	: draft-duker-as2-reliability-00.txt
	Pages		: 11
	Date		: 2005-8-12
	
The goal of this document is to define approaches to achieve a ^once 
and only once^ delivery of messages. The EDIINT AS2 protocol is 
implemented by a number of software tools on a variety of platforms 
with varying capabilities and with varying network service quality. 
Although the AS2 protocol defines a unique ^Message-ID^, current 
implementations of AS2 do not provide a standard method to prevent 
the same message (re-transmitted by the initial sender) from reaching 
back-end business applications at the initial receiver. TCP 
underpinnings of HTTP over which AS2 operates generally provide a 
good quality of network connectivity, but experience indicates a need 
to be able to compensate for both transient server and socket 
exceptions, including ^Connection refused^ as well as ^Server busy.^ 
In addition, difficulties with server availability, stability, and 
loads can result in reduced operational reliability. This document 
describes some ways to compensate for exceptions and enhance the 
reliability of AS2 protocol operation. Implementation of these 
reliability features is indicated by presence of the ^AS2-
Reliability^ value in the EDIINT-Features header.

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