RFC 7820

UDP Checksum Complement in the One-Way Active Measurement Protocol (OWAMP) and Two-Way Active Measurement Protocol (TWAMP), March 2016

Canonical URL:
https://www.rfc-editor.org/rfc/rfc7820.txt
File formats:
Plain TextPDF
Status:
EXPERIMENTAL
Author:
T. Mizrahi
Stream:
IETF
Source:
ippm (tsv)

Cite this RFC: TXT  |  XML

DOI:  10.17487/RFC7820

Discuss this RFC: Send questions or comments to ippm@ietf.org

Other actions: Submit Errata  |  Find IPR Disclosures from the IETF


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 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.


For the definition of Status, see RFC 2026.

For the definition of Stream, see RFC 4844.


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