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UDP Checksum Complement in the One-Way Active Measurement Protocol (OWAMP) and Two-Way Active Measurement Protocol (TWAMP) (RFC7820) Disclosure Number: IPCOM000245698D
Original Publication Date: 2016-Mar-01
Included in the Prior Art Database: 2016-Mar-31
Document File: 30 page(s) / 31K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

T. Mizrahi: AUTHOR


The One-Way Active Measurement Protocol [OWAMP] and the Two-Way Active Measurement Protocol [TWAMP] are used for performance monitoring in IP networks.

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Internet Engineering Task Force (IETF)                        T. Mizrahi Request for Comments: 7820                                       Marvell Category: Experimental                                        March 2016 ISSN: 2070-1721

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


   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.

Status of This Memo

   This document is not an Internet Standards Track specification; it is    published for examination, experimental implementation, and    evaluation.

   This document defines an Experimental Protocol for the Internet    community.  This document is a product of the Internet Engineering    Task Force (IETF).  It represents the consensus of the IETF    community.  It has received public review and has been approved for    publication by the Internet Engineering Steering Group (IESG).  Not    all documents approved by the IESG are a candidate for any level of    Internet Standard; see Section 2 of RFC 5741.

   Information about the current status of this document, any errata,    and how to provide feedback on it may be obtained at

 Mizrahi                       Experimental                      [Page 1]
 RFC 7820           OWAMP and TWAMP Checksum Complement        March 2016

 Copyright Notice

   Copyright (c) 2016 IETF Trust and the persons identified as the    document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal    Provisions Relating to IETF Documents    ( in effect on the date of    publication of this document.  Please review these documents    carefully, as they describe your rights and restri...