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Date:      Fri, 2 Jun 2017 11:43:55 -0400
From:      Jon Radel <jon@radel.com>
To:        byrnejb@harte-lyne.ca, freebsd-questions@harte-lyne.ca
Subject:   Re: IPv4 to IPv6
Message-ID:  <691d853e-e2f7-b5f3-d281-73511845bd6a@radel.com>
In-Reply-To: <74b7b58aa45cc01585338ef2270ccc57.squirrel@webmail.harte-lyne.ca>
References:  <74b7b58aa45cc01585338ef2270ccc57.squirrel@webmail.harte-lyne.ca>

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On 6/2/17 10:26, James B. Byrne via freebsd-questions wrote:
> We are beginning the process of transitioning to IPv6.  I have read a
> great deal respecting the difficulty of moving from IPv4 to IPv6 and
> maintaining general Internet connectivity.  If any reading this have
> gone through the process upon which we are embarking then I would be
> grateful if you share your experience. Particularly any 'gotchas' that
> cropped up.
>
> We will be using FreeBSD-11 as the platform for our Internet
> connectivity. The main services we provide publicly are SMTP and DNS.=20
> We will maintain IPv4 addresses for these together with IPv6.
>
>
Do you really plan to remove IPv4 from everything other than your SMTP
and DNS servers?  If so, how will your users [assuming you have such]
reach resources on the IPv4 Internet?  Or have I misunderstood?

An orderly migration to being dual-stacked on everything would probably
be a lot less painful than what I think you're planning.  While there
are possible mechanisms for an IPv6-only client to reach resources on
the IPv4 Internet, I'm unclear on the benefits of bothering with such an
architecture.

--=20
--Jon Radel
jon@radel.com



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