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A comment on The Ripe NCC Has Run Out of IPv4 Addresses. Parent comment

Re:The Ripe NCC Has Run Out of IPv4 Addresses by notdonspaulding on Monday November 25, 2019 @02:19PM (#21631687)
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.

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Re:The Ripe NCC Has Run Out of IPv4 Addresses by throw0101a on Monday November 25, 2019 @02:45PM (#21631990)
> 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/cas...

* https://blogs.akamai.com/2016/06/preparing-for-ipv6-only-mob...

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Re:The Ripe NCC Has Run Out of IPv4 Addresses by exhilaration on Monday November 25, 2019 @03:04PM (#21632185)
Ah, 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).
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Re:The Ripe NCC Has Run Out of IPv4 Addresses by jaywalk on Monday November 25, 2019 @04:07PM (#21632828)
My 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.

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Re:The Ripe NCC Has Run Out of IPv4 Addresses by throw0101a on Monday November 25, 2019 @04:36PM (#21633071)
> 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?

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Re:The Ripe NCC Has Run Out of IPv4 Addresses by kalleboo on Tuesday November 26, 2019 @09:54AM (#21638720)
There are apps like "Network Analyzer" that give you this info. (My MVNO puts me behind CGNAT, no IPv6)
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Re:The Ripe NCC Has Run Out of IPv4 Addresses by briffle on Monday November 25, 2019 @07:42PM (#21634550)
Seriously? On Android it's just settings->about phone
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Re:The Ripe NCC Has Run Out of IPv4 Addresses by wPfMiPmvaXQxERm on Monday November 25, 2019 @10:13PM (#21635367)
Really? My Verizon Android gets RFC6598 space.
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Re:The Ripe NCC Has Run Out of IPv4 Addresses by jaywalk on Tuesday December 03, 2019 @01:03PM (#21694813)
Holy 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.
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Re:The Ripe NCC Has Run Out of IPv4 Addresses by wmf on Monday November 25, 2019 @02:42PM (#21631961)
v6 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.
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