Comcast Business Internet and IPv6 Blog Post

See this Comcast Voices blog post for more information about Comcast Business Internet and IPv6.

Multichannel News "40 under 40" 2013

Several of Comcast's brightest are recognized in the 2013 edition of the Multichannel News "40 Under 40" including John Jason Brzozowski, who leads Comcast's IPv6 program.

Comcast Business Internet and IPv6 Trials

Comcast recently shared some long awaited news regarding IPv6 support for our Commercial Services.  We will soon begin trials for Comcast Business Internet and IPv6 as such we would like to share some important details about these trials.  First, customers interested in participating in these trials should submit their information using our Commercial DOCSIS IPv6 Trial Request form.  Once submitted the Comcast IPv6 trial team will review each request and determine eligibility for the trial.  Further, the trial will initially be conducted in areas across the Comcast footprint where the Arris C4 CMTS platform has been deployed since this is where we have been able to complete our launch of IPv6 capabilities to date.

Customers who are actively trialing our Comcast’s Metro-Ethernet (Dedicated Internet Access) are assigned a/48 sized allocation while our commercial DOCSIS product will offer a /56 delegated prefix by default and will eventually include support for both dynamic and stable allocations.  Comcast Business Internet device support for IPv6 will initially include the SMC DOCSIS 3.0 Cable Modem and Router SMCD3G-CCR (SMCD3G-CCR) and the Netgear CG3000DCR DOCSIS 3.0 Commercial Cable Modem and Router (CG3000DCR), both which are provided by Comcast.  We are also please to announce that IPv6 support for our Business Class web site will soon be enabled.

The news we are sharing today represents several significant milestones for Comcast as we continue advance our IPv6 transition.  We certainly expect the expanded deployment of IPv6 across our footprint and services to increase the penetration and use of IPv6, which in turn should yield significant increases in IPv6 traffic across the Comcast network and Internet ecosystem.

We hope you are as excited as we are about this news!

Commercial Broadband IPv6 Form

2012 IPv6 Report Card Calls Out Comcast's Efforts

We are pleased to see that a recent CircleID story recognized Comcast's efforts in a discussion on IPv6 progress in 2012. Check out the full story here at CircleID.

Comcast Engineer Receives IPv6 Award

We congratulate John Brzozowski from Comcast on his award today at the 85th meeting of the Internet Engineering Task Force (IETF)! John received the Itojun Service Award, recognizing his outstanding contributions to the advancement of next-generation Internet Protocols though his tireless efforts in providing IPv6 connectivity to cable broadband users across North America and evangelizing the importance of IPv6 deployment globally. 

This was the fourth annual Itojun Service Awards. First awarded in 2009, the Itojun Service Award honors the memory of Dr. Jun-ichiro "Itojun" Hagino, who passed away in 2007 at the age of 37. The award, established by the friends of Itojun and administered by the Internet Society, recognizes and commemorates the extraordinary dedication exercised by Itojun over the course of IPv6 development.

For more information, see this announcement.

Deployment Update

IPv6 has been launched on all Arris DOCSIS 3.0 C4 CMTSes, covering over 50% our network.  We are targeting completion of the rest of the network by mid-2013. Our progress has led to nearly 2.5% of our Xfinity Internet customers  actively using native dual stack. Additionally, IPv6 traffic has increased 375% since World IPv6 Day in June 2011.  Following World IPv6 Launch in June 2012 Comcast also observed that approximately 6% of the 2012 Olympics served over YouTube to Comcast customers was over IPv6.  

Launch FAQs

On June 4th, 2012, Comcast announced the achievement of Comcast’s World IPv6 Launch Milestone. This follows technical trials started in 2010 and over 7 years of IPv6 development work. We are the first major ISP in North America to launch native IPv6 to residential Internet users.

What is this?
Will IPv4 be disabled?
How will you enable support for IPv6 in this first phase?
Can I opt out of IPv6?
Can I disable IPv6?
With IPv6 for standalone computers, what size IPv6 prefix will I receive?
With IPv6 for home networking, what size IPv6 prefix will I receive?
Are you using tunneling or Large Scale NAT (LSN)?
Do your DNS servers support IPv6?
Do your websites support IPv6?
Do your mail servers support IPv6?
Are MDD IP Mode Override and IP Mode Override the same thing? And what does it mean?
My modem says IPv4 Only. Does this mean I shouldn't upgrade my router for IPv6 support?


What is this?
We have announced plans to deploy IPv6 XFINITY INTERNET to customers. Initially this will occur in select areas, and will reach other areas when it is technically possible.

Will IPv4 be disabled?
We are continuing to provide an IPv4 address to each customer and are now additionally providing IPv6 addresses and prefixes, where applicable; this approach is referred to as Native Dual Stack. IPv4 will remain as-is while IPv6 is introduced. Based on our testing and industry best practices, this model will offer the greatest flexibility and seamlessness during the IPv6 transition.

How will you enable support for IPv6 in this first phase?
In our first phase of deployment, we enabled IPv6 for customers with standalone computers. This is the case when a customer has just one computer, and where that computer, which meets the necessary IPv6 requirements, is plugged directly into a cable modem. We will begin with a number of DOCSIS 3.0 cable modem models (see those modems noted as IPv6-ready at http://mydeviceinfo.comcast.net). The list of supported cable modems will expand over time.

Comcast does not directly enable IPv6 functionality on end user systems. The current major consumer operating systems that meet the necessary requirements for IPv6 are Windows 7, Windows Vista, and Mac OS X 10.7 (Lion).

We have also launched support for those customers with IPv6 capable Home Gateway devices. This deployment is a phased rollout, beginning with select markets. This rollout will expand over time.

Can I opt out of IPv6?
No. In most cases, you should not need to opt out of IPv6. However, you can disable IPv6 on your system. (see the next FAQ).

Can I disable IPv6?
Yes, IPv6 can be disabled on your computer. Please refer to your operating system documentation for instructions on how to do this. Please note that operating system vendors typically do not recommended disabling IPv6.

With IPv6 for standalone computers, what size IPv6 prefix will I receive?
Comcast will allocate a /64 prefix by default to start. This is intended to prevent issues with certain home gateways that are not compatible with shorter prefix lengths. Comcast plans to deploy shorter prefix lengths in the future.

When will Comcast support IPv6 for home networking?
Comcast is planning to begin pilot market deployment of IPv6 home networking support in the near future.

Are you using tunneling or Large Scale NAT (LSN)?
No, Comcast is not deploying tunneling or Large Scale NAT (LSN or CGN) at this time. We are using Native Dual Stack, which means a customer gets both IPv6 and IPv4 addresses simultaneously. As a result no tunneling or Network Address Translation (NAT) is necessary. We believe this approach offers meaningful performance benefits to our customers compared to the alternatives.

Do your DNS servers support IPv6?
Yes, our DNS servers, both authoritative and caching, support IPv6 today. The servers can send and receive queries for IPv6 records (AAAA) and can communicate over IPv6 to end-users. The IPv6 addresses for our DNS recursive resolvers (which customers use for DNS lookups) as well as more detailed information regarding our DNS platform can be found at http://dns.comcast.net.

Do your websites support IPv6?
Several major Comcast sites are now available over IPv6 and the remainder will soon transition to IPv6.
 
Do your mail servers support IPv6?
Comcast’s mail servers are fully dual-stacked for web access, SMTP, POP, and IMAP.

Are MDD IP Mode Override and IP Mode Override the same thing? And what does it mean?
Also known as IP provisioning mode override, this is a part of the Cablelabs DOCSIS™ specifications and is an attribute that has been defined to facilitate the management of DOCSIS cable modems. This attribute does not directly pertain to the enablement of services over IPv6 like Internet or broadband data services, for example.

My modem says IPv4 Only. Does this mean I shouldn't upgrade my router for IPv6 support?
No, this indication as cited in this earlier FAQ specifically pertains to DOCSIS cable modem management and represents a separate aspect of Comcast's ongoing IPv6 deployment. We will soon have tools available that will allow you to check the availability of native IPv6 in your area. If your modem is listed as supporting IPv6 on http://mydeviceinfo.comcast.net please proceed to upgrade or enable your home networking or computing equipment to support IPv6. Once enabled to support IPv6 you will automatically begin using IPv6 over Comcast's network, providing we have launched in your area.