"IP Performance Metrics (IPPM) for spatial and multicast", Emile Stephan, Lei Liang, Al Morton, 28-Apr-09. ( bytes)

The IETF has standardized IP Performance Metrics (IPPM) for measuring end-to-end performance between two points. This memo defines two new categories of metrics that extend the coverage to multiple measurement points. It defines spatial metrics for measuring the performance of segments of a source to destination path, and metrics for measuring the performance between a source and many destinations in multiparty communications (e.g., a multicast tree).

"Spatial Composition of Metrics", Al Morton, Emile Stephan, 23-Jun-09. ( bytes)

This memo utilizes IPPM metrics that are applicable to both complete paths and sub-paths, and defines relationships to compose a complete path metric from the sub-path metrics with some accuracy w.r.t. the actual metrics. This is called Spatial Composition in RFC 2330. The memo refers to the Framework for Metric Composition, and provides background and motivation for combining metrics to derive others. The descriptions of several composed metrics and statistics follow.

"Framework for Metric Composition", Al Morton, 23-Jun-09. ( bytes)

This memo describes a detailed framework for composing and aggregating metrics (both in time and in space) originally defined by the IP Performance Metrics (IPPM) RFC 2330 and developed by the IETF. This new framework memo describes the generic composition and aggregation mechanisms. The memo provides a basis for additional documents that implement the framework to define detailed compositions and aggregations of metrics which are useful in practice.

"Reporting IP Performance Metrics to Users", Stanislav Shalunov, Martin Swany, 13-Jul-09. ( bytes)

The aim of this document is to define a small set of metrics that are robust, easy to understand, orthogonal, relevant, and easy to compute. The IPPM WG has defined a large number of richly parameterized metrics because network measurement has many purposes. Often, the ultimate purpose is to report a concise set of metrics describing a network's state to an end user. It is for this purpose that the present set of metrics is defined.

"More Features for the Two-Way Active Measurement Protocol - TWAMP", Al Morton, Kaynam Hedayat, 20-May-09. ( bytes)

This memo describes a simple extension to TWAMP - the Two-Way Active Measurement Protocol. The extension adds the option to use different security modes in the TWAMP-Control and TWAMP-Test protocols simultaneously. The memo also requests that IANA establish a registry for additional new features, called the TWAMP-Modes registry.

"TWAMP Reflect Octets Feature", Al Morton, Len Ciavattone, 13-Jul-09. ( bytes)

The IETF has completed its work on the core specification of TWAMP - the Two-Way Active Measurement Protocol. This memo describes a new feature for TWAMP: an optional capability where the responder host returns some of the command octets or padding octets to the controller, and/or ensures that the same test packet sizes are used in both directions.

"Individual Session Control Feature for TWAMP", Al Morton, Murtaza Chiba, 7-Mar-09. ( bytes)

The IETF has completed its work on the core specification of TWAMP - the Two-Way Active Measurement Protocol. This memo describes a new feature for TWAMP, that gives the controlling host the ability to start and stop one or more individual test sessions using Session Identifiers. The base capability of the TWAMP protocol requires all test sessions previously requested and accepted to start and stop at the same time.

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