IETF 98 Report

The IETF meetings are relatively packed events lasting over a week, and it’s just not possible to attend every session. Inevitably each attendee follows their own interests and participates in Working Group sessions that are relevant and interesting to them. I do much the same when I attend IETF meetings.…


Addressing 2016

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. The process of exhausting the remaining…


BGP in 2016

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…


RIPE 73

RIPE held its 73rd meeting in Madrid in the last week of October. Here are a few of my takeaways from that meeting. What’s behind all those NATs? We suspect that there are at least 10 billion devices connected to today’s Internet, and we know that less than two billion…


The Death of Transit?

I was struck at a recent NANOG meeting just how few presentations looked at the ISP space and the issues relating to ISP operations and how many were looking at the data centre environment. If the topics that we use to talk to each other are any guide, then this…


Labs retires the old ipv6-measurement graphs

As the stats.labs.apnic.net/ipv6 code has reached a stable service, we’ve decided to retire the old labs.apnic.net/ipv6-measurement/ tree of graphs. For people with saved URLs, it should redirect to the new service, and should map an ASN or Economy to the right dataset. For people who are farming the site for…


IETF 96

The IETF meetings are relatively packed events lasting over a week, and it’s just not possible to attend every session. Inevitably each attendee follows their own interests and participates in sessions that are relevant and interesting to them. I do much the same when I attend IETF meetings, and from…


IPv6 and the Internet of Things

It has often been claimed that IPv6 and the Internet of Things are strongly aligned, to the extent that claims are made they are mutually reliant. An Internet of Things needs the massively expanded protocol address space that only IPv6 can provide, while IPv6 needs to identify a compelling use…


Declaring IPv4 “Historic”

At the IETF 95 meeting at the start of April I was in a meeting of the IPv4 Sunset Working Group, and heard Lee Howard present on a proposal that recommended that IP version 4, or to be specific, that the technical protocol specification documented in RFC 791, be declared…


Fragmentation

One of the more difficult design exercises in packet switched network architectures is that of the design of packet fragmentation. In this article I’d like to examine IP packet fragmentation in detail and look at the design choices made by IP version 4, and then compare that with the design…