RFC 4737 on Packet Reordering Metrics

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        RFC 4737

        Title:      Packet Reordering Metrics 
        Author:     A. Morton, L. Ciavattone,
                    G. Ramachandran, S. Shalunov,
                      J. Perser
        Status:     Standards Track
        Date:       November 2006
        Mailbox:    acmorton@att.com, 
                    lencia@att.com, 
                    gomathi@att.com,  shalunov@internet2.edu, 
                    jperser@veriwave.com
        Pages:      45
        Characters: 94699
        Updates/Obsoletes/SeeAlso:   None

        I-D Tag:    draft-ietf-ippm-reordering-13.txt

        URL:        http://www.rfc-editor.org/rfc/rfc4737.txt

This memo defines metrics to evaluate whether a network has maintained
packet order on a packet-by-packet basis.  It provides motivations
for the new metrics and discusses the measurement issues, including
the context information required for all metrics.  The memo first
defines a reordered singleton, and then uses it as the basis for
sample metrics to quantify the extent of reordering in several
useful dimensions for network characterization or receiver design.
Additional metrics quantify the frequency of reordering and the
distance between separate occurrences.  We then define a metric
oriented toward assessment of reordering effects on TCP.  Several
examples of evaluation using the various sample metrics are
included.  An appendix gives extended definitions for evaluating
order with packet fragmentation.  [STANDARDS TRACK]

This document is a product of the IP Performance Metrics
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 unlimited.

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