UDP Checksum Complement in the One-Way Active Measurement Protocol and Two-Way Active Measurement Protocol
RFC 7820, “UDP Checksum Complement in the One-Way Active Measurement Protocol and Two-Way Active Measurement Protocol”, is an Experimental document published in March 2016 by T. Mizrahi. The canonical text is published by the RFC Editor.
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.
What “Experimental” means
Describes a specification that is part of a research or development effort, published so the community can gain experience with it.
The canonical text of RFC 7820 is hosted at rfc-editor.org. Available in TXT,HTML.
- RFC 7819 Privacy Considerations for DHCP
- RFC 7821 UDP Checksum Complement in the Network Time Protocol
- RFC 7818 URN Namespace for MEF Documents
- RFC 7822 Network Time Protocol Version 4 Extension Fields
- RFC 7817 Updated Transport Layer Security Server Identity Check Procedure for Email-Related Protocols
- RFC 7823 Performance-Based Path Selection for Explicitly Routed Label Switched Paths Using TE Metric Extensions
- RFC 7816 DNS Query Name Minimisation to Improve Privacy
- RFC 7824 Privacy Considerations for DHCPv6