IPv6 deployment excuses

Mon Jul 4 13:49:11 UTC 2016

In message <B9CDA0F3-AE6F-435D-9904-C2AE05BCCCCB at rivervalleyinternet.net>, Matt
 Hoppes writes:
> I disagree. Any data center or hosting provider is going to continue to
> offer IPv4 lest they island themselves from subscribers who have IPv4
> only - which no data center is going to do.
>
> One can not run IPv6 only because there are sites that are only IPv4.
>
> Thus, as an ISP you can safely continue to run IPv4. Ipv4 won't be going
> away for at least ten years or more - if ever.
>
> I'm not saying don't be ready for IPv6. I'm not saying don't understand
> how it works. But doomsday isn't here.

There are ISP's that are essentially IPv6 only today as they do not
have enough IPv4 addresses to give all their customers a public
IPv4 address.

Once you need to run a GGN you may as well run DS-Lite, MAP* or
(shudder) DNS64/NAT64 as NAT444.  There is no need to talk IPv4 to
your customers today.  You still need a small number of IPv4 address
to talk to legacy IPv4 servers on the internet.  Just because there
owners don't know they are legacy servers doesn't mean they aren't.

Mark
-- 
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: marka at isc.org