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The IESG has approved the following document: - 'Round-trip Packet Loss Metrics' (draft-ietf-ippm-rt-loss-05.txt) as Proposed Standard This document is the product of the IP Performance Metrics Working Group. The IESG contact persons are Wesley Eddy and Martin Stiemerling. A URL of this Internet Draft is: http://datatracker.ietf.org/doc/draft-ietf-ippm-rt-loss/ Technical Summary Many user applications (and the transport protocols that make them possible) require two-way communications. To assess this capability, and to achieve test system simplicity, round-trip loss measurements are frequently conducted in practice. The Two-Way Active Measurement Protocol specified in RFC 5357 establishes a round-trip loss measurement capability for the Internet. However, there is currently no metric specified according to the RFC 2330 framework. This memo adds round-trip loss to the set of IP Performance Metrics (IPPM). Working Group Summary The normal IPPM WG process was followed and the document has been discussed for several years. The document as it is now, reflects WG consensus, with nothing special worth noting. Document Quality All implementations of TWAMP (which is fairly wide-spread) and Cisco IP-SLA v1 (which is VERY wide-spread) perform a RT-loss measurement consistent with the metric in this draft. This metric is measured more that 100K times each day (and that's a conservative estimate). AT&T has 1000 TWAMP end points and 1000 IP-SLA end points making this measurement every 15 minutes, 96 times per day. Personnel The document shepherd is Henk Uijterwaal, and the responsible AD is Wesley Eddy.