Spring 2021 Roundtable Meeting

The UK IPv6 Council held its Spring roundtable meeting on the afternoon of Wednesday 16th June.

The theme was home and consumer IoT and networking.

The agenda:

  • Opening/Overview of IPv6 traffic levels as of June 2021 – Veronika McKillop (UK IPv6 Council) [slides]
  • Update on RIPE554-bis (RIPE IPv6 ICT Tender guidance) – Tim Chown (Jisc) [RIPE554-bis PDF snapshot as of June2021] – to contribute feedback please join the RIPE IPv6 WG list.
  • Home LAN IPv6 setup (discussion) – led by Loba Olopade (Virgin Media) [PDF]
  • World of IoT & IPv6 [slides]
  • Matter (formerly CHIP/Connected Home over IP) – IPv6 development in consumer IoT space – Vinay Rao (SmartThings/Samsung) [slides]

The event was hosted online, via Zoom.


IPv6 Council Annual Meeting 2020

The Council held its 2020 Annual Meeting on Thursday 17th December, as an online-only meeting via Zoom.

Presentation materials and videos of the talks are now available below.

Agenda (all times are GMT):

1:00PM – open Zoom meeting for attendees to join early

Block 1

1:30PM – Official start and welcome (UK IPv6 Council) [PDF] [video] and Global Status Update [PDF]  [video]

1:45PM – Experience with IPv6-only at Athlone Institute of Technology (Colin Donohue & Ian Hallissy, AIT) [PDF]  [video]

2:15PM – DDoS challenges in IPv6 environment (Pavel Odintsov, FastNetMon) [PDF] [video]

2:55PM – Tea & coffee break

Block 2

3:10PM – Community Fibre IPv6 Update (Sam Defriez, Community Fibre) – 15 minutes including Q&A [PDF][video]

3:25PM – Any other ISP updates

3:30PM – CDN Provider’s view of IPv6 in 2020 (Erik Nygren, Akamai) [video]

4:05PM – Deeper dive into the recent Windows ICMPv6 vulnerability (Fernando Gont, SI6 Networks) [PDF] [video]

4:35PM – Any other business, topics, quick updates from the attendees and closing

If you have any queries about the event, please email contact@ipv6.org.uk.

8th IPv6 Council Roundtable

The Council held a roundtable meeting on Tuesday 27th October, from 3pm-5pm, online-only meeting via Zoom.


15:00 – Opening & welcome

15:10 – ISP updates (Belgium & UK)

15:30 – Red Hat Openshift (Kubernetes) IPv6 support – presented by Pieter Lewyllie (Belgian IPv6 Council & RedHat)

15:50 – Discussion

16:00 – Break

16:10 – How to deploy IPv6 like a pro (and avoid major failures) – discussion lead by Ed Horley & Tom Coffeen (Hexabuild)

17:00 – Closing


The event was held jointly with the Belgian IPv6 Council.

IPv6 VPN survey

The UK IPv6 Council will be discussing IPv6 support and operational issues with VPN services at its upcoming Roundtable meeting on 28th April.

We’d very much appreciate you taking a few moments to complete a brief survey to help inform the discussion.

The survey is at https://www.surveymonkey.co.uk/r/P5W75BS

For meeting details and free registration, see https://www.ipv6.org.uk/2020/04/14/spring-2020-roundtable-meeting/.


Spring 2020 Roundtable meeting

The UK IPv6 Council held its seventh round table meeting online, from 2-4pm BST on 28th April.

The agenda was as follows:

14:00 Opening and introductions
14:10 “UK IPv6 status update” – including quick announcements from any ISPs [slides]
14:20 “Incorrect Working of IPv6 Clients/Networks on the Internet” – Johannes Weber [slides]
14:45 “New IPv6 RFC drafts” – draft-gont-6man-slaac-renum, draft-ietf-v6ops-slaac-renum and draft-ietf-v6ops-cpe-slaac-renum – Richard Patterson and Fernando Gont [slides – Richard, slides – Fernando]
15:15 Break (sorry, no Coffee-over-IP!)
15:25  “IPv6-only projects at Imperial College London” – David Stockdale [slides]
15:50 “Results of the IPv6 VPN survey” – including discussion of IPv6 remote working tools [slides]
16:10 AOB and discussion of plans and priorities for the Council for 2020
16:30 Close

IPv6 Council Annual Meeting 2019

Annual Meeting of UK IPv6 Council was held at the Facebook offices in London on 12th December 2019.

For the after-meeting social we joined forces with NetLdn meeting at The Wheatsheaf next to the Facebook office.

Meeting Agenda

10.00am Arrivals and registrations

10.30am Welcome and opening – Veronika McKillop (UK) [slides]

10.40am IPv6 Segment Routing – Clarence Filsfils, Cisco (FR) [slides]

11.10am ISP Updates – BT/EE [slides], Sky [slides] [video recording from UKNOF45], Hyperoptic [slides], Community Fibre [slides]

11.55am Global IPv4 address space runout and UK IPv6 Council update – Veronika McKillop [slides]

12:15pm IPv6 Matrix (ISOC) [link]

12.20pm Jim Bound Awards 2019 [slides]

12.30pm LUNCH

1.30pm Ungleich IPv6-only Hosting – Nico Schottelius, Ungleich (CH) [slides]

1.55pm IPv6 in the Aviation Industry – Andy Gatward, SITA (UK) [slides]

2.20pm Microsoft IT Ongoing Journey to IPv6-only – Veronika McKillop, Microsoft (UK) [slides] [video recording from RIPE79]


3.15pm Mythic Beasts Cloud IPv6 Hosting – Pete Stevens, Mythic Beasts (UK) [slides]

3.45pm Adventures in 6VPE and EVPN IPv6 – Dave Freedman, Claranet (UK) [slides]

4.15pm Azure IPv6 Update – Fabrizio Ferri, MS Azure (UK) [slides]

4.45pm Open discussion

5.00pm Close


Directions – to Facebook London and from Facebook to the Wheatsheaf

Our thanks to Facebook for providing the venue.

Cloud and IPv6 Workshop

This workshop of the UK IPv6 Council gave information about the current level of IPv6 support in various Cloud offerings, as well as other IPv6 challenges in virtualised environments.

It was held at Imperial College London on Tuesday 3rd September 2019, from 1.00pm to 5.30pm.

The rationale: Existing information on the Internet is piecemeal, hard to put together for Cloud customers and therefore we want to enable our members and the industry with this information.


13:00 – 13:30 – Doors open – buffet lunch will be available

13:30 – 13:35 – Welcome & Opening
13:35 – 13:45 – Why IPv6 matters for Cloud now (Veronika McKillop, Microsoft, UK) (PDF)
13:45 – 14:30 – IPv6 in Azure (Fabrizio Ferri, Microsoft Azure, UK) (PDF)
14:30 – 15:15 – Current state of IPv6 support in AWS (Scott Hogg, Hexabuild, USA) (PDF)

15:15 – 15:45 – Tea & coffee break

15:45 – 16:15 – The challenge of getting delegated IPv6 connectivity in cloud environments (Radek Zajic, CZ) (PDF)
16:15 – 16:45 – The reasons for IPv6-only hosting (Nico Schottelius, Ungleich, CH) (PDF)
16:45 – 17:15 – Overview of IPv6 support in container technologies (Pieter Lewyllie, Cisco, BE) (PDF)
17:15 – 17:30 – Closing & relocation to a nearby pub

As we usually do, we will go for a few drinks after the event where everyone is welcomed to join us and continue discussing IPv6 in a less formal setting. The pub to meet in is The Queen’s Arms, which is at 30 Queens Gate Mews, Kensington, SW7 5QL.


Imperial College London
Room SALC10, Seminar and Learning Centre, Level 5, Sherfield Building
Exhibition Road

IPv6 Council Annual Meeting, Dec 2018

The UK IPv6 Council held its 2018 Annual Meeting on Friday 7th December at BT Centre, London, close to St Paul’s tube station.

The agenda with links to slide decks is below, along with video recordings kindly made by the BT events team.

Our thanks again to BT for their excellent hosting of the event, including refreshments during the day.

Agenda and Slide decks (PDFs)

09:30 Coffee

10:00 Morning Session

Opening and looking back at 2018
Veronika McKillop, Microsoft –  [slides] [video]

IPv6 Keynote
Jen Linkova, Google – [slides] [video]

ISP Updates
Nick Heatley, EE – [slides]
Loba Olopade, Virgin – [slides]
Mathew Chigwende, Liquid Telecom – [slides]
Combined recording of ISP updates: [video]

Jim Bound Awards
Presented by Veronika McKillop – [slides] [video]

12:00 Lunch

13:00 Afternoon Session I

LinkedIn Enterprise
Tim Crofts, LinkedIn – [slides] [video]

IPv6 in the Enterprise
Steve Youell, JP Morgan – [slides] [video]

IPv6 for WLCG/CERN research
Duncan Rand, Imperial College – [slides] [video]

IPv6 at Queen Mary University London
Chris Walker, QMUL – [slides] [video]

Mail and Web Servers First?
Benedikt Stockebrand, Stepladder IT Training+Consulting GmbH – [slides] [video]

15:00 Coffee break

15:30 Afternoon Session II

IPv6 for Peer-to-Peer Applications
Darrin Veit, Microsoft – [slides] [video]

Implementing NAT64 and DNS64
Terry Froy, QMUL – [slides] [video]

IPv6 Matrix and measurement discussion
Olivier Crepin-Leblond, ISOC UK – [slides] [video]

Open discussion / Q&A

17:00 Close

Discussions then continued in the nearby Paternoster

IPv6 Transition Workshop, Sep 2018

The Council held an afternoon workshop on IPv6 transition technologies in the Huxley Building at Imperial College London on 25 September 2018. The event was attended by over 30 people, and featured a lot of good discussion during and after the meeting.

Our thanks to Imperial for providing the venue and refreshments.

Materials are available below:

Historical view of IPv6 Transition / Integration / Co-Existence – Tim Chown, Jisc – slides (PDF)

Overview of IPv6 Transition Technologies – Veronika McKillop, Microsoft – slides (PDF)

Dual-stack in enterprise networks – David Stockdale, Imperial – slides (PDF)

NAT64 in enterprise deployments – Veronika McKillop, Microsoft – slides (PDF)

464XLAT for Mobile Operators – Nick Heatley, EE – slides (PDF)

MAPping of Address and Port Overview – Richard Patterson, Sky – slides (PDF)

DS-Lite Implementation, Key Considerations – Loba Olopade, Virgin – slides (PDF)

IPv4-as-a-Service – Sander Steffan, Retevia – slides (PDF)


6th Anniversary of World IPv6 Launch

Six years have passed since the World IPv6 Launch on 6 June 2012. Not only have we witnessed a change on a global level, we have seen history change for IPv6 in the UK too. From being a laggard to being part of the pack of Top 10 IPv6 Countries. Anniversaries are always a good opportunity for reflection and to look back, so let’s do it.

In June 2012, according to Google IPv6 Statistics, the UK IPv6 traffic levels were at 0.08%, global IPv6 traffic levels were at 0.63%. Fast forward six years, in June 2018, Google sees 23.65% of user traffic on IPv6, while the UK internet population sends respectful 21.6%,  closely following the global average; the biggest UK IPv6 peak we saw so far was 23% on 1 January 2018. In addition to Google and APNIC, Facebook also provides publicly accessible statistics on IPv6 adoption. The page shows a very similar pattern to the Google data and currently puts the UK at number seven (24%) in the IPv6 adoption table.

What contributed to this significant change?  What enabled our country to move from the tail to the Top 10 IPv6 countries globally, as per the data at APNIC Labs? Let’s go over the last 6 years.

The landscape

In 2012, there was minimal IPv6 deployment in the UK, with around 0.2% of Internet users having access to IPv6.  This was largely from early deployment on Janet, the UK’s national research and education network, and the very first smaller ISPs who took the IPv6 plunge, at the forefront of which were Andrews and Arnold.  While these few ISPs understood the rationale for IPv6 and were offering it to their customers, their contribution to the UK landscape as a whole was, sadly, relatively small.

In April 2014, the UK IPv6 Council was founded with the aim to create a platform to let people share their experiences with IPv6 deployment. While there are other groups and organisations that focus on service provider community, the UK IPv6 Council is a place for everyone, from enterprises, service providers, academia and government, who wants to come and learn from others or help educate the UK IPv6 community. Since its foundation, the Council has grown to almost 600 members, has organised four annual meetings, eight roundtable sessions, two specific topic-focused workshops, and we are planning more. We believe that this platform helped encourage the positive change in attitude to IPv6 that was reflected in the growth of IPv6 deployment in the UK since then.

Who really pushed the IPv6 number up?

Sky announced that they were working on their IPv6 rollout at the first annual Council meeting in October 2014, at which time the UK IPv6 numbers were at just 0.29%. In August 2015, Sky started an internal employee trial and the UK traffic doubled to 0.6%. In Spring 2016, Sky started full-scale customer rollout and the UK IPv6 numbers soared to 15%.  They now offer IPv6 to 98% of their subscribers.

The next wave of UK IPv6 growth is coming from other ISPs who have started to pull their weight. Based on APNIC IPv6 statistics for AS2856, British Telecom has recently surpassed 3 million subscribers on IPv6 (~37% of the AS), and the number only continues to rise.

Virgin Media is also known to be running internal trials and customer trials and we can’t wait for their product launch, hopefully starting later in 2018.

The only remaining large UK broadband ISP which has not publicly stated any IPv6 plans is TalkTalk.

In the mobile provider community, it is EE/BT that leads IPv6 deployment. They are the first UK mobile operator to offer mobile data connections as IPv6-only; they have enabled over 2M consumer customers with IPv6 and expect that growth to continue. Within their network, all EE 4G voice (Voice-over-WiFi, Voice-over-LTE) is over IPv6.

By 2018, the rationale for IPv6 has also changed in an interesting way. From being a subject for the technical community, it is catching the attention of finance people in organisations all over the world. Since IANA allocated the last of the unused IPv4 address space in 2011, the price of that address space on the open market has slowly risen. That cost increases the financial drivers to move away from IPv4 and to explore IPv6-only deployment given IPv6 address space is freely available. Some interesting IPv4 price ranges are published by the IPv4 Market Group; an IPv4 shopping trip is only getting more expensive with time.  In the UK, a good example of changing practices is Mythic Beasts, a hosting company who offers IPv6-only VPS platforms; IPv4 addresses are available to their customers, but as a chargeable extra, as Pete Stevens described during his talk at UKNOF 34 in 2016. We all know that finance departments don’t like chargeable extras.

That’s the story of six years of IPv6 in the UK in a few paragraphs. Thanks to all the UK companies named above but also the unnamed, who have helped the UK progress to be one of the Top 10 IPv6 countries worldwide.  It needs all of us to do our bit so that we continue to lead and to move forward.

IPv6 efforts do get recognised

The last thing that we would like to mention today is that the industry closely watches IPv6 development in all countries. So even if you might think that your IPv6 work goes unnoticed, be sure that is not the case. The UK IPv6 growth has been recognised on an international level; since 2016, ten companies have received a prestigious Jim Bound Award for being an IPv6 World Leader.

2016 – Sky was the first awarded UK company

2017 –  Many more contributed to the UK IPv6 growth: BT, Microsoft IT, Bytemark, Andrews & Arnold, Rackspace, Brasshorn, AQL, CableCom, and Call27

2018 – We can already see new names who will qualify for the award; the new World IPv6 Leaders will be announced at the annual UK IPv6 Council meeting at the end of 2018.

Your company could also be on that list. It needs to send 20% or more of its network traffic on IPv6. Would you care to join the ranks of the World IPv6 Leaders?  If so, let’s see deployment now!

Happy IPv6 Anniversary!

UK IPv6 Council Core team