Apologies for some minor distruption with IPv6 today in relation to services we run in the Maidenhead Data Centre. There have been a few minutes during today where routing has not been quite right for IPv6 for some of the services.

We have renumbered our office on to a separate /48 to improve native IPv6 routing. (A /48 is visible to more of the Internet).

Over the next few days or weeks we will be renumbering services in the data centre from 2001:8b0::/48 to 2001:8b0:1::/48 addresses. Thanks to a customer (Lawrence) for allowing us to change is allocation to free that up.

If you want to trust an IPv6 as being from A&A infrastructure you should be able to trust 2001:8b0::/47 as this includes the /48 was have in London and the /48 we have in Maidenhead and our offices.

At present there may be a handful of machines which are not technically A&A infrastructure within this space that will be renumbered this week as well. A&A infrastructure should have reverse DNS under aa.net.uk as well.

We aim to parallel run the old and new IPv6 during DNS changes so that there are no issues with any services. If anyone has any issues please contact support.

We are not planning any IPv4 changes.

Note, customers that have IPv6 on fibre from Maidenhead can now request a /48 if you need, routed via your existing /64 link.