Packet Delay Variation Applicability Statement
RFC 5481

Approval announcement
Draft of message to be sent after approval:

From: The IESG <>
To: IETF-Announce <>
Cc: Internet Architecture Board <>,
    RFC Editor <>, 
    ippm mailing list <>, 
    ippm chair <>
Subject: Document Action: 'Packet Delay Variation Applicability 
         Statement' to Informational RFC 

The IESG has approved the following document:

- 'Packet Delay Variation Applicability Statement '
   <draft-ietf-ippm-delay-var-as-03.txt> as an Informational RFC

This document is the product of the IP Performance Metrics Working Group. 

The IESG contact persons are Lars Eggert and Magnus Westerlund.

A URL of this Internet-Draft is:

Technical Summary

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.

Working Group Summary

This document was suggested after a talk on this topic at IETF-65.  
There was no controversy in the WG process.  Consensus was smooth.


The document shepherd is Henk Uijterwaal ( Lars
Eggert ( has reviewed this document for the IESG.