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On the last day of December 2016 there was a brief hiccup as the world’s clocks adjusted their time according to the Coordinated Universal Time (UTC) standard by adding an extra second to the last minute of the 31st of December. This is not unusual by any means, and this…
If I learned one thing at NANOG 96 it’s how to build an up-to-date state of the art AI data centre! As I now understand it, the process is quite simple: take everything that is at the raw bleeding edge of today’s technology: a collection of some 60,000 advanced GPUs…
In theory, the design of IPv6 was such that the upper-level end-to-end transport protocols, namely TCP and UDP need not be aware of the IP layer protocol being used. We should be able to use IPv4 and IPv6 interchangeably in the DNS right? This topic was the subject of an…
There have been a number of services that allow a lookup of an IP address or Autonomous System Number (ASN) and return information about that IP number resource. The Regional Internet Registries (RIRs) each operate a database that records (among other data items) the number resource and the details of…
The Regional Internet Registries (RIRs) each operate a database that records (among other data) the number resource and the details of the entity that currently holds the resource allocation. The data can be queried using individual queries using the whois query tool, by giving an IP Address or an Autonomous…
It’s time for another annual roundup from the world of IP addresses. Let’s see what has changed in the past 12 months in addressing the Internet and look at how IP address allocation information can inform us of the changing nature of the network itself. Back around 1992, the IETF…
The first part of this annual report on BGP for the year 2025 looked at the size of the routing table and some projections of table growth for both IPv4 and IPv6. However, the scalability of BGP as the Internet’s routing protocol is not just dependant on the number of…
At the start of each year, it’s been my practice to report on the behaviour of the Internet’s inter-domain routing system over the previous 12 months, looking in some detail at some metrics from the routing system that can show the essential shape and behaviour of the underlying interconnection fabric…
Where are you? Or, for that matter, where am I? Let’s look at location on the Internet, and how the Internet “knows” where I am. With devices that have GNSS (Global Navigation Satellite System) enabled, such as my mobile device, where I am is an easy question to answer. If…
The North American Network Operators Group (NANOG) can trace its antecedents to the group of so-called “Mid Level” networks that acted as feeder networks for the NSFNET, the backbone of the North American Internet in the first part of the 1990’s. NANOG’S first meeting has held in June 1994, and…
