Packet Delay Variation Applicability Statement

Document Type Replaced Internet-Draft (individual in gen area)
Last updated 2015-10-14 (latest revision 2007-11-18)
Replaced by draft-ietf-ippm-delay-var-as
Stream IETF
Intended RFC status (None)
Expired & archived
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Stream WG state (None)
Document shepherd No shepherd assigned
IESG IESG state Replaced by draft-ietf-ippm-delay-var-as
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Responsible AD Lars Eggert
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


Packet delay variation metrics appear in many different standards documents. The metric definition in RFC 3393 has considerable flexibility, and it allows multiple formulations of delay variation through the specification of different packet selection functions. Although flexibility provides wide coverage and room for new ideas, it can make comparisons of independent implementations more difficult. Two different formulations of delay variation have come into wide use in the context of active measurements. This memo examines a range of circumstances for active measurements of delay variation and their uses, and recommends which of the two forms is best matched to particular conditions and tasks.


Al Morton (
Benoit Claise (

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)