http://www.rfc-editor.org/rfc/rfc7750.txt
RFC 7750: Differentiated Service Code Point and Explicit Congestion Notification Monitoring in the Two-Way Active Measurement Protocol (TWAMP), J. Hedin, G. Mirsky, S. Baillargeon2016-02-01T23:00:00-00:00This document describes an optional extension for Two-Way Active Measurement Protocol (TWAMP) allowing the monitoring of the Differentiated Service Code Point and Explicit Congestion Notification fields with the TWAMP-Test protocol.