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We are pleased to announce in partnership with our partner Spitfire that we can now accept orders for IPv6 on Ethernet circuits. The core network is IPv6 ready and both EFM and Fibre Ethernet, together with their managed Cisco routers, also now support IPv6.

What is World IPv6 day?

World IPv6 day is organized by the Internet Society and this year some of the biggest content providers on the Internet such as Google, Facebook, Yahoo and Akamai are going to be taking part in the biggest experiment yet to find “IPv6 brokeness”.

What is going to happen?

These large internet players already have IPv6 enabled services but they have put them on special

domains such as ipv6.google.com and http://www.v6.facebookbook.com. So if you lookup the regular

http://www.facebook.com you only get an IPv4 address returned and of you lookup http://www.v6.facebook.com

you only get an IPv6 address returned (the IP address being 2620:0:1cfe:face:b00c::3 by the way!).

On 8th June for a period of 24 hours these websites will turn on IPv6 DNS replies for their main URLs –

http://www.facebook.com and http://www.google.com

What might break?

The predictions are that a very small amount of people (estimates vary from 0.05% to 0.15%) will not be able the reach these pages for the day. The purpose of these big content providers taking part for the first time is that they will be able to compare usage levels with comparable days and identify the scale if any in the reduction in traffic. In addition because they are such highly frequented websites if they start “dropping off the Internet” people will notice and report the issues which will help tease out as yet unidentified issues. Known issues are with some versions of the Opera/Firefox web browser, some versions of Apple OS and Windows Vista – these have bugs that when presented with an IPv6 and an IPv4 address choose only the IPv6 address or take a very long time to fallback to the IPv4 address. This is a problem when over 99% of Internet users only have IPv4 connectivity so cannot reach the IPv6 address at the moment.

Why do this?

It is an important exercise for two reasons. Firstly as the Internet transitions to IPv6 it is important to remain backwards compatible with IPv4 as the two are likely to exist in “dual stacked” systems for many years this day should prove whether that is possible. Secondly if it all goes to plan it gives confidence to other websites to start moving their content to Ipv6.

What happens at the end of IPv6 day?

It is expected that after 24 hours the DNS records will be changed back so everyone can look at the results and sit back and take stock.