Comcast’s Xfinity Internet Now the World’s Largest Native IPv6 Deployment

Re:Comcast’s Xfinity Internet Now the World’s Largest Native... by tedunangst on Tuesday November 26, 2013 @07:57PM (#6805480)

Since Comcast is handing out /128s, now you get to enjoy the thrill of IPv6 and NAT!

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Re:Comcast’s Xfinity Internet Now the World’s Largest Native... by simoncion on Tuesday November 26, 2013 @08:10PM (#6805528)

I don't know where you are, but I'm a Comcast customer in San Francisco.

I have a /64 assigned to me through Prefix Delegation ( http://en.wikipedia.org/wiki/Prefix_delegation ). My router talks to Comcast's router over a link-local address.

I know, a /64 isn't a /56 or even a /48 like they should be handing out, but it's a far cry from a /128. Where are you seeing /128s being handed out? Are you sure that your router isn't misconfigured in some way?

If you're basing your information on the info here: http://www.comcast6.net/index.php/ipv6-deployment-faq do know that it's out of date. The bug mentioned in Toastman and Shibby builds has been fixed for quite a while. (Indeed, I'm running unmodified Shibby on my router [with some firewall rules to patch over some crappy daemon interface binding decisions that the guy made.].)

EDIT: agawa reports that Comcast is handing out /60s. I'll play around a bit with my network this weekend and see what I've misconfigured/misunderstood.

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Re:Comcast’s Xfinity Internet Now the World’s Largest Native... by agwa on Tuesday November 26, 2013 @08:48PM (#6805668)

Comcast should give you up to a /60 if you ask for it, no matter where you are:

https://secure.dslreports.com/forum/r28725662-IPv6-ALL-areas...

Indeed, I can get a /60 here in the Bay Area.

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Re:Comcast’s Xfinity Internet Now the World’s Largest Native... by simoncion on Saturday November 30, 2013 @06:11PM (#6825102)

So, it looks like I can ask for a /60, and I get offered a /60 and a /64. (I can ask for a /61, and I get offered a /61 and a /64.) Unfortunately, the /64 is offered with a higher priority, so the router uses that.

A thread on dslreports.com indicates that this might be because I had a recently released lease on the /64, so I'm gonna release the lease for three or four days to see if that will fix the issue.

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Re:Comcast’s Xfinity Internet Now the World’s Largest Native... by simoncion on Wednesday December 04, 2013 @12:32PM (#6848499)

I released the lease for two, three days and I now have a /60. Yay!

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Re:Comcast’s Xfinity Internet Now the World’s Largest Native... by simoncion on Tuesday November 26, 2013 @08:57PM (#6805705)

I'll try to play around with my network this weekend. It might be mis-configured, or I might just be stupid.

Thanks much for the information!

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Re:Comcast’s Xfinity Internet Now the World’s Largest Native... by nemothekid on Tuesday November 26, 2013 @08:58PM (#6805712)

I'm getting a /64 on my airport express. I do subscribe to blast plus, however I have never contacted comcast about ipv6

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Re:Comcast’s Xfinity Internet Now the World’s Largest Native... by tedunangst on Wednesday November 27, 2013 @10:31AM (#6808553)

indeed, i assumed they were handing out a /128 because their ipv6 faq said they were handing out a /128.

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Re:Comcast’s Xfinity Internet Now the World’s Largest Native... by simoncion on Wednesday November 27, 2013 @02:04PM (#6810316)

I really wish that they would update that FAQ. :/

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