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Comcast's IPv6 Deployment Has Started

This site has the latest information about Comcast's IPv6-related work, and is regularly updated as our IPv6 deployment continues.

IPv6 Trial News and Information:

New Firmware for NetGear CMD31T Device Released
Monday, May 14, 2012

NetGear and Comcast have completed emergency testing, certification, and field soak with their new firmware that resolved the previous IPv6 defect. This new firmware should now be running on all CMD31T devices operating in our network. In addition, NetGear has updated their existing unsold devices, some of which are now available at Walmart stores around the country. We appreciate NetGear's close cooperation to bring this to closure.

IPv6 Deployment Expands to Support Home Gateway Devices
Wednesday, April 25, 2012

This first phase of our IPv6 deployment, started in 2011, supports directly connected CPE, where a single computer is directly connected to a cable device. We have now entered a major new phase, which supports home gateway devices (a.k.a. home routers). To learn more, check out FAQs on the pilot market deployment and the announcement and technical details on our blog.

Resolution of NetGear CMD31T Device Issue
Thursday, April 12, 2012

NetGear provided Comcast with new firmware for emergency testing and certification. This process has completed and the critical IPv6 defect is resolved. We identified one open but non-blocking IPv6-related issue that we anticipate will be fixed in a firmware update from NetGear in the near future. This new firmware is in the process of being deployed to all of these devices operating on our network. In any areas where we had temporarily rolled back IPv6, we have turned IPv6 back on again. We have also resumed our national IPv6 deployment.

Xfinity, XfinityTV, and Customer Support Forum Web Sites Go Native Dual Stack
Tuesday, April 10, 2012

Our Xfinity and XfinityTV web portals, as well as our customer support forum have begun the move to IPv6 by enabling support for Native Dual Stack. The first part to move was our customer support forum, at forums.comcast.com, which went live in December 2011. This was in partnership with our support forum vendor, Lithium. The newest part today moves two of our major portal sites to IPv6, including Xfinity and XfinityTV. This critical move was made possible via close cooperation with Akamai, our CDN vendor. Over time, we will introduce support for native IPv6 for all of our other key websites.

Statement Regarding NetGear CMD31T Devices
Thursday, March 29, 2012

Comcast is in the process of deploying IPv6 nationally, as noted on this site in great detail. We recently identified that the retail NetGear CMD31T device ships with and runs an uncertified version of firmware that exacerbates a critical IPv6-related defect. To ensure Comcast customers with these devices will continue to have uninterrupted Internet service, we have rolled back IPv6 temporarily in some parts of our network to give NetGear more time to address the issue. Comcast anticipates NetGear will soon address the issue for their retail devices, which we will test and deploy on an emergency basis.

Comcast Announces Participation in World IPv6 Launch Event
Tuesday, January 17, 2012

We are pleased to announce our participation in a second Internet Society-organized global IPv6 event, World IPv6 Launch. We have released the following statement from one of our executives: "IPv6 deployment is a key priority for Comcast in 2012, and we're excited to participate in this ISOC event that will help catalyze action around the world on this important transition."

IPv6 Pilot Market Deployment Begins
Wednesday, November 9, 2011

Comcast has started our first pilot market deployment of IPv6 a limited part of California. This first phase supports directly connected CPE, where a single computer is directly connected to a cable device. A subsequent phase will support home gateway devices. To learn more, check out FAQs on the pilot market deployment and the announcement and technical details on our blog.

IPv6-Based DNS Servers Available
Tuesday, August 30, 2011

We now have IPv6-based DNS servers available for customers to use as their recursive DNS servers. These are Anycast-based and so you need only use two IP addresses, no matter where in our network you are located. These are now available for use on a beta testing basis at the IP addresses 2001:558:FEED::1 and 2001:558:FEED::2.

World IPv6 Day Begins This Evening
Tuesday, June 7, 2011

World IPv6 Day begins this evening in the U.S. Comcast will be continuously monitoring our network and customer contact volume closely during this event, from an IPv6 command center in Philadelphia. We anticipate that the overwhelming majority of our customers should not experience any difficulty accessing participating web sites. Nevertheless, if a customer does have difficulty, they can run a simple test to see if World IPv6 Day is the cause, by visiting http://test-ipv6.comcast.net. If a problem is discovered, instructions are be provided on that page. In addition, for Windows users that experience a problem, Microsoft has released a special fix. If customers need additional help, they should visit our customer forums.

DOCSIS-Based Native Dual Stack Trial Expands
Monday, June 6, 2011

We have recently expanded our DOCSIS-based IPv6 Native Dual Stack trials to select locations in the following metropolitan areas: San Francisco, CA, Philadelphia, PA, Miramar, FL, and Chicago, IL. This round of expansion includes the addition of home network equipment from D-Link. The successful expansion of our trials is a clear indicator of the Comcast’s and the cable industry’s readiness for IPv6. One important benefit of this event is to continue to exercise and prepare the infrastructure that we will use to deliver IPv6 to our subscribers.

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