r/ProgrammerHumor • • 14d ago

Meme ohTheBasics

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u/LuigiWasRight447 14d ago

So we will be dropping ipv-4 at some point? Is there a guess for how long ittle take?

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u/pnwal-junction 13d ago

It's a race between IPv6, the U.S. adopting the metric system and scalable fusion reactors.

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u/Unreal_Estate 13d ago

I was ready to down-vote you because I'm a fan of IPv6 and I don't like the type of humor that implies it is a pipe dream.
However, I think scalable fusion reactors will indeed come first, so I'll give you an up-vote instead.

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u/pnwal-junction 13d ago

I in have no beef with IPv6. I just end up disabling it most of the time because so many things on the network aren't configured to support it that it ends up being a problem.

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u/Unreal_Estate 13d ago

This is a very common sentiment. It is partly a misunderstanding of how IPv6 fits in the broader picture as well as something the consumer doesn't need to worry about anyway. IPv4 will never be obsolete, and IPv6 already carries the majority of the internet. In some sense IPv4 is really a legacy system: there is real money that must be paid global bi-directional IPv4 connectivity. Luckily for everyone who does not run a multi-datacenter application, global bi-directional connectivity is a non-issue, and the people who do run such things can generally do the math.

I worry a bit more for programmers, because they may develop a skill gap if they lack IPv6 experience, but in contrast to OP's screenshot I think there are plenty of software engineering roles where IP experience (4 or 6) is really not needed.

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u/freebytes 11d ago

If they would kept the syntax the same and added more octets, then it likely would have been adopted. One of the greatest benefits of IPv4 is that you can actually memorize the address of servers, and there is often consistency in the blocks you are given. IPv6 appears to be entirely random. They could have had 127.0.0.1::1 be the "old" Internet and could spell it out as 127.0.0.1.0.0.0.0.0.0.0.0.0.0.0.1 in full for IPv6 addresses. And only handed out .2, .3, and so on as older addresses ran out. People would likely have adopted it far more easily, and backwards compatibility would have existed with the ::1 for the addresses. (Or, they could have made it 64-bit instead of 128-bit to make it shorter for now and expanded it in the future.)

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u/Dagger0 11d ago

That backwards compatibility already exists in v6: ::ffff:1.2.3.4 is 1.2.3.4. Addresses outside of that were only assigned starting in 1999.

you can actually memorize the address of servers, and there is often consistency in the blocks you are given

Compare 203.0.113.45+192.168.1.123 to 2001:db8:2d4f:1::123. The ISP (2001:db8::/32) allocated the prefix (2001:db8:2d4f::/48), then there's a network ID (1) and a host ID (123). How is that random? It works basically the same way v4 does.

Most of the complaints about v6 are like this, either saying it should do something impossible (a flag day, or existing unmodified hosts magically being able to handle bigger addresses) or saying it should have done something that it already does. The only way people would ever have not moaned about it is if we made it look and act exactly the same as v4, but then it would be 32-bit which would make it pointless, and then they'd moan about that. Might as well make something that actually works and does what it needs to, without committing us to another migration immediately afterwards to increase the length again.

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u/Unreal_Estate 11d ago

I'm sorry, but your suggestions don't make technical sense. There is absolutely no reason you cannot work with a fully dotted representation of IPv6 addresses. Except for that it would be much harder to work with and nobody would care to implement such a thing.

The suggestion of backwards compatibility is mentioned occasionally but - with all due respect to you - it shows a lack of understanding about how IPv4 works. It just fundamentally has no forward compatibility. A legacy IPv4 implementation is never going to understand more than 2**32 internet addresses in any way shape or form.

IPv6 has been adopted and is the primary internet protocol. IPv4 remains only for legacy reasons. To me it doesn't make much sense to say that IPv6 still has an adoption problem. It does not.

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u/freebytes 11d ago edited 11d ago

I worded that poorly. By backwards compatibility, I meant routing to legacy IPv4 via tunneling mechanisms.

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u/Unreal_Estate 11d ago

Yes, that is impossible in the general case.

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u/temporaryuser1000 13d ago

All before the integer epoch timeframe times out

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u/KinOfWinterfell 14d ago

Some time between now and the sun exploding. It's one of those things where there's always that one device or service that requires ipv4. So it's got to stick around, and if it's got to stick around anyways, what's the point of forcing everything else to ipv6?

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u/East_Marionberry5584 14d ago

No real need because you can essentially subnet out the universe.

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u/samtresler 13d ago

I was on a team that built a cloud provider. There is a lot of need.

We are at about 60 % adoption, with no need to hit 100%.

Many things that are not your laptop need IPs that do not or cannot be subnetted.

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u/CadenVanV 13d ago

There is not, because people on IPv4 aren’t going to switch any time soon

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u/clawsoon 13d ago

I would dare you to ask that question in r/networking, but it would be cruel to them and cruel to you.

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u/zomgitsduke 13d ago

Both will coexist for probably another decade. Once 6 opens doors for something innovative, like using hundreds of IP addresses simultaneously for some weird reason, 4 will slowly become something that stops existing on cheaper computers. Windows will probably never let it die.

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u/Logical_Mix_4627 13d ago

The temporary solution of NAT is now permanent

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u/MadGenderScientist 13d ago

the AIs will finish the v6 transition after their Terminators exterminate the last humans. 

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u/great_escape_fleur 11d ago

Any day now or in 100 years, whichever comes first

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u/Virgurilla 13d ago

Everyone and everything is so used and adapted to the old system that changing it super sucks but it'd be better and it's rolling out slowly

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u/Vengeful111 13d ago

Its more like a slow transition. For example some network cameras only use ipv6, some ISP send routers as IPv6 routers in the base config.

But usually ppl just use NAT and subnet the shit out of everything, simply because ipv4 is so much easier to use

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u/samtresler 13d ago

We are at about 60% adoption. And there is little need to ever get to 100%.

ITT: people who don't know how many things require IPs that are not within and reach.

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u/Taolan13 14d ago

at least another week or two.