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To the best of my knowledge, Comcast is running dual-stack v4 and v6. The GP was talking about running a purely v6 network, and pointing out that it wasn't yet
by notdonspaulding 7y ago
To the best of my knowledge, Comcast is running dual-stack v4 and v6. The GP was talking about running a purely v6 network, and pointing out that it wasn't yet feasible. Your example of Comcast doesn't really fit the bill because Comcast already has a v4 network to all of their customers, and they are not migrating customers to a solely-v6 network.
This is the chicken-and-egg problem that all new networks are facing with regard to IPv6 adoption. In order to have a usable network, you have to support IPv4 to all endpoints. But once you have v4 at all endpoints, the incentive to run v6 is greatly diminished.
As always, v6 needs a "killer app" that Grandma wants to use that is unavailable over the v4 internet, and then network administrators could use the actual demand from their customers as a justification for moving to v6. Unfortunately, at the moment, the list of v4-only must-have apps is still greater than the list of v6-only must-have apps.
- wmf 7y agov6 with DS-Lite/464/MAP is going to be cheaper than v4-only because it allows the ISP to sell off (or not buy) most of their v4 addresses while also using less equipment. T-Mobile has already adopted this architecture.
- throw0101a 7y ago> The GP was talking about running a purely v6 network, and pointing out that it wasn't yet feasible. Amusingly that's how mobile/smartphones are supposedly run: the devices get IPv6-only, and if they need to hit an IPv4-only address they are CGNATed. * https://www.internetsociety.org/resources/deploy360/2014/case-study-t-mobile-us-goes-ipv6-only-using-464xlat/ https://www.internetsociety.org/resources/deploy360/2014/cas... * https://blogs.akamai.com/2016/06/preparing-for-ipv6-only-mobile-networks-why-and-how.html https://blogs.akamai.com/2016/06/preparing-for-ipv6-only-mob...
- exhilaration 7y agoAh, so that explains it. I just switched from Sprint (which always gave me an IPv4 address) to T-Mobile (which gives me an IPv6 address).
- jaywalk 7y agoMy Verizon iPhone has both a public IPv4 address and a public IPv6 address. They certainly could be using CGNAT, but that seems like a weird way to do it.
- throw0101a 7y ago> My Verizon iPhone has both a public IPv4 address and a public IPv6 address. How are you able to tell with IPv4? You cannot run ifconfig on an iPhone, so how are you determining that?
- wPfMiPmvaXQxERm 7y agoReally? My Verizon Android gets RFC6598 space.
- jaywalk 7y agoHoly cow, I don't know how I was never aware of RFC6598. When I saw the address starting with 100, I simply assumed it was an actual routable IP.