Hacker News Board Hacker News, browsed like a classic message board
Live data from Hacker News

Posters of the IPv4 and IPv6 internet as of Jan 1, 2023

vad.solutions

Post reply on HN
Print view View original

81–90 of 104 posts

Re: Posters of the IPv4 and IPv6 internet as of Jan 1, 2023

#81

Post by mike_hock »

iforgotpassword wrote: post #31
kstrauser wrote: post #11

Earlier quoted context omitted.

Short answer: because they got there first. Longer answer: it doesn’t really matter in the scheme of things. I saw where someone did the math of recovering all the corporate /8s (assuming that there was a justifiable reason for repossessing address space that they requested and were allocated fair and square). It would extend the IPv4 timeline by like a month and a half. IPv4 is used up, and it’d be exceptionally dif…

It'll probably get bought by Amazon after like five minutes. ;-)

So you're saying there are good reasons not to do it.

Re: Posters of the IPv4 and IPv6 internet as of Jan 1, 2023

#82

Post by daneel_w »

themoonisachees wrote: post #68
daneel_w wrote: post #50

Can anyone write a little bit on 240.0.0.0/4 ("Future use"), 48.0.0.0/8 ("Prudential securities", same as Wachovia?) and 25.0.0.0/8, what they are about and why they're seemingly entirely unused?

240/4 ("class E") addresses were intended a buffer for future allocation, but they can't use it for global unicast because a lot of equipment considers any IP above 239.255.255.255 to be invalid. There have been RFCs to make it formally global-unicast and local-unicast but none have succeeded because of the above-mentionned poorly programmed equipment. That said, if you know your equipment can handle it like some net…

"That said, if you know your equipment can handle it like some network operators know theirs can, there is nothing stopping you from using it as a /4 local address space."

Though that would just exarcerbate the problem by producing yet more resistance against allowing that gigantic network to become useful public space.

Re: Posters of the IPv4 and IPv6 internet as of Jan 1, 2023

#83

Post by killingtime74 »

mkj wrote: post #53
charcircuit wrote: post #26

Earlier quoted context omitted.

What is the benefit to the ISP in supporting IPv6 to justify the extra cost of the support?

They don't need to buy as expensive cgnat hardware if a greater proportion of traffic is ipv6. That's the rationale given by an up-and-coming ISP in Australia.

Which ISP? (am curious as an Australian)

Re: Posters of the IPv4 and IPv6 internet as of Jan 1, 2023

#84

Post by Volundr »

dx034 wrote: post #57

Does anyone have a good resource to really get ipv6? I have an intuitive understanding of ipv4 but still struggle to understand ipv6 in a way that would make me feel comfortable switching over. So far, all docs I read made it look vastly more complicated than ipv4.

Not IPv6 specific, but I can't recommend Networking for System Administrators by Michael Lucas highly enough. Very well written and easy to understand.

Re: Posters of the IPv4 and IPv6 internet as of Jan 1, 2023

#86

Post by adrium »

240/4 was reserved for future use more than 30 years ago. When is 'the future' if not now. Furthermore, reservations for 0/8, 127/8, and 224/4 seem mostly useless at this point.

Also Ford, Daimler, and Prudential owning huge network blocks and neither even doing business in networking, nor announcing prefixes can be referred to as outright IP squatting (if that term exists). The US DOD seems to be a squatter, too.

Based on professional experience, I doubt that networking equipment can not handle reserved blocks. And if it does not indeed, patches could be provided by vendors for sure within reasonable time.

The problem is not severe enough: neither for a switch to IPv6 (also conceived almost 30 years ago!) nor to make use of unused blocks.

I refuse to believe that IPv4 address exhaustion is actually a thing.

Re: Posters of the IPv4 and IPv6 internet as of Jan 1, 2023

#87

Post by nerdbert »

adrium wrote: post #86

240/4 was reserved for future use more than 30 years ago. When is 'the future' if not now. Furthermore, reservations for 0/8, 127/8, and 224/4 seem mostly useless at this point. Also Ford, Daimler, and Prudential owning huge network blocks and neither even doing business in networking, nor announcing prefixes can be referred to as outright IP squatting (if that term exists). The US DOD seems to be a squatter, too. Ba…

Imagine how many problems would be caused by releasing 0/8 and 127/8 space. There are so many places those are hardcoded, including an uncountable number of internal company applications.

Re: Posters of the IPv4 and IPv6 internet as of Jan 1, 2023

#88

Post by philjohn »

gorgoiler wrote: post #21

The ghostly amount of v6 space is so exciting to see. One day we’ll need to physically route a whole block to another planet — there’s no point using BGP when the ping from Earth to Mercury is 230,000ms at best. I love IPv6 and it’s so exciting to see it used widely at last. My mobile device is v6 although it’s still dual stack. Home networks are doomed to by v4 forever so your 1990s eToaster can display Yahoo! News!…

Happily running dual stack, with a routed /48 (further subdivided between work, IoT, management and trusted VLAN's). It's crazy though that the 2nd biggest ISP in the country, Virgin (DOCSIS cable) STILL haven't rolled out IPv6; say what you will about BT/OpenReach, but they got IPv6 to market in the UK pretty damn fast.

Re: Posters of the IPv4 and IPv6 internet as of Jan 1, 2023

#90

Post by mgbmtl »

dx034 wrote: post #57

Does anyone have a good resource to really get ipv6? I have an intuitive understanding of ipv4 but still struggle to understand ipv6 in a way that would make me feel comfortable switching over. So far, all docs I read made it look vastly more complicated than ipv4.

What kind of user/admin are you? To setup a LAN, to setup servers, other? If it's a LAN, what kind of router do you have?

I agree many howtos tend to get into the little obscure differences and weird rabbit holes (ex: tunnelling).

Post reply on HN