Re: how do I disable IPv6?

[Andy Ruhl <acruhl%gmail.com@localhost>]

On Mon, Jan 6, 2020 at 4:29 PM Greg A. Woods <woods%planix.ca@localhost> wrote:
> IPv6 adds enormous amounts of unnecessary code, complexity, attack
> surface, and possible confusion, in network environments that will
> continue to work just fine without any trace of it for the foreseeable
> future.  I still use "no options INET6" or its equivalent universally.
>
> That "someday", in terms of requiring IPv6, is probably at least a
> decade away for my ISP.  They do have one kind of modem now that offers
> IPv6 via DHCPv6, but it is not yet widely deployed, and in fact is
> probably a dead-end product as it is not well liked, and they charge
> extra for it, and they're still doing all new installs with other modems
> by default that they do not support IPv6 on (though I'm sure the devices
> themselves could be configured to support IPv6).

Not sure what you mean by "unnecessary" part, but IPv6 is not
unnecessary to me. These arguments you are making are the usual FUD
resistance to IPv6 I think. I won't say there's no merit to them but I
think it's not unique to IPv6, this stuff always exists. You would
have to explain the confusion part to me, that could get interesting.

I have been using IPv6 at home for over 3 years with no real issues.
I'm even doing IPv6 routing at home for fun. About 50% of my traffic
to the internet is IPv6 native because my mobile devices connected
over WiFi prefer it. But I am still using dual stack... "Happy
eyeballs" seems to work pretty well though.

There are some notable stragglers among major companies on the
internet to adopt IPv6, but it seems like most have from my
perspective.

Google says a major percentage of internet traffic is IPv6 native:

https://www.google.com/intl/en/ipv6/statistics.html

Mobile network devices are mostly already able to use IPv6 natively
from my short and rudimentary research.

With 5G home routers coming soon, I see major displacement of current
wired ISPs. I'm guessing they will tunnel IPv4 within IPv6 to some
extent. T-Mobile is already doing this natively on mobile devices,
their entire network is IPv6 native. Maybe some others are too. Seems
inevitable that the entire IPv4 internet will be tunneled over IPv6
soon if it isn't already.

IPv6 works. I'm always interested in hearing about why it doesn't though.

Andy