A New Internet-Draft is available from the on-line Internet-Drafts directories.
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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