Re: [v6ops] IPv4 trajectory

["Bjoern A. Zeeb" <[e-mail]>]

> On 02 Apr 2015, at 06:36 , Alexandru Petrescu <[e-mail]> wrote:
> 
> Sorry to insist on this, just as side note.
> 
> Le 01/04/2015 19:54, Bjoern A. Zeeb a écrit :
>>> On 01 Apr 2015, at 14:07 , Alexandru Petrescu
>>> <[e-mail]> wrote:
>>> 
>>> It is customary to see current computers having both an IPv6 stack
>>> and an IPv4 stack on them.  But some computers only have IPv4,
>>> whereas the rest have IPv4 and IPv6 stacks.  There are no
>>> computers (to my knowledge) which have only IPv6 stacks.
>> 
>> One of my desktop systems does (not have IPv4 support anymore;
> 
> In general I can agree with you, in a sense where maybe a computer is
> not reachable on IPv4 from another computer; maybe part of IPv4 support
> is no more there.

On FreeBSD I compile it out of my kernel and parts of user space if I want to.  We did this for World IPv6 Day almost 4 years ago: http://www.prweb.com/releases/2011/6/prweb8529718.htm

If you used FreeBSD jails for services you could run them IPv6-only since FreeBSD 7.2 and you do get “Address Family Not Supported” back for every IPv4 operation you try to do (7.2 was released in May 2009).  Gosh, been doing this for more than 5 years already.


>> and to my knowledge you can just disable it on Windows as well,
> 
> Right - uncheck the IPv4 box, and check IPv6 on a computer Windows 7's
> “Properties" of the network interface - it works.

Wrong:

netsh interface ipv4 uninstall
and reboot

and you’ll not see IPv4 anymore in route print or ipconfig /all and ping 127.1 will no longer work but error on you.


>> so it’s not a big deal anymore).
> 
> I beg to differ, as I see it this is still far away from an ideal where
> only IPv6 were present in the computer.


Well, better start living it today and we can have a lot better operational discussions on the end-node (client/server systems) side.   I have 7 IPv4 addresses left in use in total for all my infrastructure (and could condense it to 2 or 3 if I wanted really badly).  And the only reason I keep those is for the ipv4-only world to reach NS/MX/Web.  But that’s just me.  Leave a /27 for a SMB and be good ;-)

— 
Bjoern A. Zeeb                                  Charles Haddon Spurgeon:
"Friendship is one of the sweetest joys of life.  Many might have failed
 beneath the bitterness of their trial  had they not found a friend."