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Rene Wilhelm

RIPE NCC Staff — 10 Jul, 2010 04:25 PM
World IPv6 Launch - Results from HTTP Measurements by Rene Wilhelm — last modified 01 Dec, 2016 12:01 AM

For World IPv6 Launch the RIPE NCC measured 60 selected participants from over 50 vantage points all over the world. In this article we present the DNS and HTTP measurement results from a 4-day period as a 3 minute movie. We will discuss general observations and look at some specific events.

Interesting Graph - How Accurate is the RIPE Routing Registry? by Rene Wilhelm — last modified 30 Nov, 2016 11:52 PM

Last month we published a graph that shows how complete the RIPE Routing Registry really is. How many of the organisations that receive an Autonomous System Number (ASN) from the RIPE NCC use the RIPE Routing Registry to register their route objects. The results were encouraging. But do these route objects match the prefixes announced in the BGP routing tables?

How to Define Address Space as 'routed' ? by Rene Wilhelm — last modified 30 Nov, 2016 11:37 PM

When can a particular address block considered to be globally routed. The purpose of this document is to come up with a definition of "globally" routed prefixes which can be used in any analysis of RIS data, both recent and historic.

Members and Number Resources, One Year Later by Rene Wilhelm — last modified 30 Nov, 2016 10:08 PM

Last year, in a series of two articles, we presented statistics on the number of RIPE NCC members and the resources distributed to our members. With twelve months passed, we revisit the topic and look at how things evolved in 2010.

Impact of IPv4 Transfers on Routing Table Fragmentation by Rene Wilhelm — last modified 24 Nov, 2016 01:19 PM

IP address transfers have the potential to create more entries in the routing table for the same amount of address space. We analyse the net effect that four years of IPv4 transfers in the RIPE NCC service region have had on routing table growth and compare this to growth for allocations from which no transfers have been made.

How Pingable are the Pingables? by Rene Wilhelm — last modified 17 Oct, 2016 08:58 AM

In February 2011 the RIPE NCC implemented the "pingable:" and "ping-hdl:" attributes in the RIPE Database. These attributes were added to the Routing Policy Specification Language by RFC 5943 to allow networks to advertise IP addresses that are reachable and can be used as a target for diagnostic tests. Five years later we check how the new attributes have been adopted and how reachable the pingable addresses registered in the RIPE Database are when pinged from RIPE Atlas.

BGP Leaks in Indonesia by Rene Wilhelm — last modified 17 Oct, 2016 08:58 AM

In this article we are looking in some more detail at BGP leak in Indonesia and illustrate how RIPEstat visualisations can help to assess the impact.

IPv4 in the RIPE NCC Service Region - Three Years After Reaching the Last /8 by Rene Wilhelm — last modified 17 Oct, 2016 08:58 AM

In September 2012 the RIPE NCC reached its last /8 of available IPv4 addresses. This activated a new phase in the RIPE IPv4 policies, with each LIR now eligible to receive one final /22 allocation. In this article we look at developments in IPv4 allocations and remaining addresses at the RIPE NCC in the three years since then.

RIPE Atlas Code for Analysis and Statistics Reporting by Rene Wilhelm — last modified 17 Oct, 2016 08:56 AM

We are releasing the code we use to analyse RIPE Atlas measurements and produce summary statistics. This will make processing these measurement results easier for the community. We're also inviting you to participate in improving this further.

RIPE NCC Membership Statistics - November 2012 by Rene Wilhelm — last modified 17 Oct, 2016 08:55 AM

At the end of Q3 2012, we looked at the number of RIPE NCC members and the resources allocated over the last few months. We were interested to see if there are any significant changes since the RIPE NCC started allocating from the last /8.

Impact of K-root Expansion as Seen by RIPE Atlas by Rene Wilhelm — last modified 17 Oct, 2016 08:54 AM

In the course of 2015 we have expanded the K-root anycast cluster with 17 hosted servers in 15 new cities. We look at RIPE Atlas to see what impact this had on performance on both global and regional scales.

Another Look at RIPE Atlas Probe Lifetimes by Rene Wilhelm — last modified 17 Oct, 2016 08:54 AM

We take another, more detailed look at probe lifetimes and the dynamics of probes connecting and disconnecting from the RIPE Atlas infrastructure to try to understand how to keep the network growing in the long term.

RIPE NCC Membership and Available IPv4 Statistics - an Update by Rene Wilhelm — last modified 17 Oct, 2016 08:54 AM

Ahead of RIPE 72, we wanted to take another look at our membership statistics. Was membership growth affected by the Executive Board's resolution preventing multiple LIR accounts? And how will the growth in new LIRs affect the projected lifespan of the available IPv4 pool?