A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the IP Performance Metrics Working Group of the IETF.
Title : UDP Checksum Trailer in OWAMP and TWAMP
Author : Tal Mizrahi
Filename : draft-ietf-ippm-checksum-trailer-00.txt
Pages : 11
Date : 2014-12-17
Abstract:
The One-Way Active Measurement Protocol (OWAMP) and the Two-Way
Active Measurement Protocol (TWAMP) are used for performance
monitoring in IP networks. Delay measurement is performed in these
protocols by using timestamped test packets. Some implementations use
hardware-based timestamping engines that integrate the accurate
transmission timestamp into every outgoing OWAMP/TWAMP test packet
during transmission. Since these packets are transported over UDP,
the UDP checksum field is then updated to reflect this modification.
This document proposes to use the last 2 octets of every test packet
as a Checksum Trailer, allowing timestamping engines to reflect the
checksum modification in the last 2 octets rather than in the UDP
checksum field. The behavior defined in this document is completely
interoperable with existing OWAMP/TWAMP implementations.
The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-ippm-checksum-trailer/
There's also a htmlized version available at:
http://tools.ietf.org/html/draft-ietf-ippm-checksum-trailer-00
Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.
Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/
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