Category Archives: NOMA

NOMA: Static snapshot and nexts

A while back, I wrote a guest blog for APNIC on the topic of the first results from the NOMA pilot work with RIPE NCC’s Atlas framework.

I concluded: “Nevertheless, while these results are pretty preliminary, they do highlight the value of the in-network perspective on IPv4 and IPv6 performance, and motivate further study. For instance, it seems the performance of IPv6 is better when measuring to a “near” target. One hypothesis is that performance improvement is because transit networks are not as friendly to IPv6 traffic as access networks. Other hypotheses are also possible, and only testing will tell.”

In a world where IPv6 and IPv4 network connectivity and routing are very clearly not symmetric, that testing could be really valuable, if for no other reasons than to show progress with IPv6 deployment, salute the networks that have made the progress, and help identify issues remaining.

A network operator perspective on IPv6 performance | APNIC Blog

A network operator perspective on IPv6 performance | APNIC Blog

Guest Post: The Network Operator Measurement Activity (NOMA) platform explores the possibility of making use of data within constituent networks for Internet health metrics measurements.



Data! NOMA gets air (time) in Budapest


Today I had the opportunity to talk to the RIPE meeting crowd about my use of the RIPE NCC Atlas measurements infrastructure to simulate the NOMA v6 health metric measurement.  NOMA is based on operators instrumenting their networks.  The RIPE Atlas infrastructure, with its probes distributed throughout a variety of networks, is a good platform for illustrating what could be done, with live (if somewhat limited) data.

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NOMA Measurements Template (Media)

This  is the persistent reference page for the NOMA Measurements Template document.  Please use this page’s URL to refer to the document:

Current version of the document:

Internet Measurements Landscape (2016): Systems, Approaches and a Comparative Framework (Media)

This  is the persistent reference page for the Internet Measurements Landscape (2016) paper.  Please use this page’s URL to refer to the paper (

Current version of the document:

2016 NOMA Vision Paper (Media)

This is the persistent reference page for the 2016 NOMA Vision Paper.  Please use this page’s URL to refer to the paper:

Current version of the document: (Updated URL for reference to Internet Measurements Survey paper)

Older versions of the document:


Measurements of networks: what more could there be in the world?

The TechArk NOMA (Network Operator Measurement Activity) is focused on  developing operator-driven network health measurements through the definition and promotion of self-instrumentation and information sharing.)  This is all with a goal of ensuring a better, shared understanding of what “good” Internet looks like.

An important question is whether there is anything left to measure in operator networks?  At an invitational workshop in June of this year, the answer seemed to be “why, yes, there is”.

Various measurements are made of and across networks today, but they are often done without the specific involvement of the operators of those networks, and therefore have to make guesses or generalizations about them.  On the flipside, there’s a lot that goes into the customer’s experience of the Internet that can be adjusted and improved if network operators have a comprehensive instrumentation of their own networks.

The report from that workshop is now available here: .  Have a read through to see more about the experiences of one network operator that has implemented such instrumentation and possible paths forward to achieve the NOMA goal.

Measurements: Actors, Expertise and Uses

There are distinguishable roles in establishing, running and extracting results from any set of data about networks.   In some cases, one entity will handle more than one role. In all cases, the access and expertise of the entity impacts how they carry out the role.   That is, the operator of a network is in a better position to understand the network being measured (access), although they may not have as much experiment and analysis expertise as a non-affiliated researcher.   The 3 key roles are:

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Looking for comments: Internet Measurements Landscape

I’d like to pick your brain for just a little bit…

The Internet has been measured and analyzed since the first connection was made between networks.   Since measurement activities are shaped by everything from the intentions of the people taking the measurements to the vantage point of network and service operators, there are many different approaches and activities that are underway today that make up the landscape of “Internet measurement activities”.   NOMA is tackling one corner of the landscape, but understanding its value is dependent on an awareness of the bigger picture.

To that end, we’re drafting a paper that aims to provide an overview of existing Internet measurement activities, approaches, challenges and activities, to build out a map of that measurement landscape. It is aimed at the general reader with an interest in the topic, including policy makers, measurement experts wishing to position their work in the landscape of such activities, and network operators seeking to understand available tools, services and practices with regard to measuring the Internet from their network’s perspective.

With this post, and subsequent ones over the coming weeks,  I’m putting out draft text and asking if you would kindly share your thoughts on any errors or omissions, or even just general insights.

Comments to measuring<at>  would be most appreciated.

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Internet Health, NOMA, and the Internet Society

An unexpected benefit of World IPv6 Launch in 2012 has been an ongoing look into the state of IPv6 deployment in access networks around the globe, as measured by participating websites. One of the guiding principles was that those making a public commitment to IPv6 deployment had to deliver, and it had to be publicly verified. We established a dashboard that indicated whether or not the website was delivering IPv6 on its homepage. Those websites in turn measured the extent to which the access networks were delivering IPv6.

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NOMA gets some (good) air

In Buenos Aires the other week, I had the opportunity to talk through the principles of NOMA with some measurements people and Internet operators, who were meeting to discuss IPv6 measurements in general.


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