[ippm] I-D Action: draft-ietf-ippm-checksum-trailer-04.txt
internet-drafts@ietf.org Mon, 09 November 2015 06:43 UTC
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Subject: [ippm] I-D Action: draft-ietf-ippm-checksum-trailer-04.txt
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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 Complement in OWAMP and TWAMP Author : Tal Mizrahi Filename : draft-ietf-ippm-checksum-trailer-04.txt Pages : 12 Date : 2015-11-08 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 Complement, 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: https://tools.ietf.org/html/draft-ietf-ippm-checksum-trailer-04 A diff from the previous version is available at: https://www.ietf.org/rfcdiff?url2=draft-ietf-ippm-checksum-trailer-04 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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