Fragmenting IPv6

The design of IPv6 represented a relatively conservative evolutionary step of the Internet protocol. Mostly, it’s just IPv4 with significantly larger address fields. Mostly, but not completely, as there were some changes. IPv6 changed the boot process to use auto-configuration and multicast to perform functions that were performed by ARP…


Declaring IPv6 an “Internet Standard”

I’ve already shared my thoughts following a session of the IPv4 Sunset Working Group at IETF 95 that considered whether to declare IPv4 an “Historic” specification. Of course, as one would expect for a meeting of a Standards Development Organization (SDO), that wasn’t the only standards process discussion through the…


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…


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…


Getting multi-economy ASN IPv6 stats right

The stats.labs.apnic.net/ipv6 web has just grown a new feature: it can now account for the ASN contribution to an economies visible IPv6, when the ASN is not ‘resident’ in that economy. For most graphs, this doesn’t change much. But for some economies, its exposing the contribution of some significant ASN…


IPv6 Performance

Every so often I hear the claim that some service or other does not support IPv6 not because of some technical issue, or some cost or business issue, but simply because the service operator is of the view that IPv6 offers an inferior level service as compared to IPv4, and…


Revising Apple and IPv6

A few weeks ago I wrote about Apple’s IPv6 announcements at the Apple Developers Conference. While I thought that in IPv6 terms Apple gets it, the story was not complete and there were a number of aspects of Apple’s systems that were not quite there with IPv6. So I gave…


Changes to the Way We Measure IPv6

For some years at APNIC Labs we have been conducting measurement experiments concerning the extent of use of IPv6 using a technique of embedding the measurements within the advertisement using Adobe Flash. The results of this measurement are fed into a set of measurement web resources at http://stats.labs.apnic.net/ipv6. The use…


An Update on IPv6

In the coming weeks another Regional Internet Registry will reach into its inventory of available IPv4 addresses to hand out and it will find that there is nothing left. This is by no means a surprise, and the depletion of IPv4 addresses in the Internet could be seen as one…


Apple and IPv6

It’s Apple’s Developers Conference time again, and in amongst the various announcements was week, in the “Platforms Status of the Union” presentation was the mention of IPv6. Sebastien Marineau, Apple’s VP of Core OS told the conference that as far as IPv4 addresses are concerned exhaustion “is finally here”, noting…