[ippm] RFC 7820 on UDP Checksum Complement in the One-Way Active Measurement Protocol (OWAMP) and Two-Way Active Measurement Protocol (TWAMP)
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Subject: [ippm] RFC 7820 on UDP Checksum Complement in the One-Way Active Measurement Protocol (OWAMP) and Two-Way Active Measurement Protocol (TWAMP)
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A new Request for Comments is now available in online RFC libraries.
RFC 7820
Title: UDP Checksum Complement in the
One-Way Active Measurement Protocol (OWAMP) and
Two-Way Active Measurement Protocol (TWAMP)
Author: T. Mizrahi
Status: Experimental
Stream: IETF
Date: March 2016
Mailbox: talmi@marvell.com
Pages: 15
Characters: 30611
Updates/Obsoletes/SeeAlso: None
I-D Tag: draft-ietf-ippm-checksum-trailer-06.txt
URL: https://www.rfc-editor.org/info/rfc7820
DOI: http://dx.doi.org/10.17487/RFC7820
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 time 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.
This document is a product of the IP Performance Metrics Working Group of the IETF.
EXPERIMENTAL: This memo defines an Experimental Protocol for the
Internet community. It does not specify an Internet standard of any
kind. Discussion and suggestions for improvement are requested.
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