Measuring Route Origin Validation

How well are we doing with the adoption of Route Origin Validation in the Inter-Domain routing space? There have been many workshops and training sessions and much in the way of counting the generation of RPKI certificates and Route Origin Attestations in recent months. The data published by the US…


RPKI and Trust Anchors

I’ve been asked a number of times: “Why are we using as distributed trust framework where each of the RIRs are publishing a trust anchor that claims the entire Internet number space?” I suspect that the question will arise again the future so it may be useful to record the…


BGP in 2019 – Part 2

The first part of this report looked at the size of the routing table and looked at some projections of its 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 prefixes carried in the routing…


BGP in 2019 – Part 1

It has become a tradition (or quite possibly a habit) each January for me to report on the behaviour of the inter-domain routing system over the past year, looking in some detail at some metrics from the routing system that can show the essential shape and behaviour of the underlying…


Path Prepending in BGP

In this article I’d like to look at one particular aspect of the Internet’s inter-domain routing framework, namely the role of the Autonomous System (AS) Path in the operation of BGP, and in particular the use of AS Prepending. What is an Autonomous System? To introduce this topic a brief…


Why is Securing BGP just so Damn Hard?

Stories of BGP routing mishaps span the entire thirty-year period that we’ve been using BGP to glue the Internet together. We’ve experienced all kinds of route leaks from a few routes to a few thousand or more. We’ve seen route hijacks that pass by essentially unnoticed, and we’ve seen others…


Happy Birthday BGP

The first RFC describing BGP, RFC 1105, was published in June 1989, thirty years ago. By any metric that makes BGP a venerable protocol in the internet context and considering that it holds the Internet together it’s still a central piece of the Internet’s infrastructure. How has this critically important…


BGP in 2018 – Part2: BGP Churn

The first part of this report looked at the size of the routing table and looked at some projections of its 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 prefixes carried in the routing…


BGP in 2018 – Part 1: The BGP Table

It has become either a tradition, or a habit, each January for me to report on the experience with the inter-domain routing system over the past year, looking in some detail at some metrics from the routing system that can show the essential shape and behaviour of the underlying interconnection…


Securing the Routing System at NANOG 74

The level of interest in the general topic of routing security seems to come in waves in our community. At times it seems like the interest from network operators, researchers, security folk and vendors climbs to an intense level, while at other times the topic appears to be moribund. If…