[AusNOG] IPv6 is hard.

[Mark Andrews]

In message <C7F0AB1B-1A4A-45F2-A780-246834F19A82 at oneshoeco.com>, Tom Lanyon wri
tes:
> On 05/07/2012, at 12:01 PM, Mark Newton wrote:
> > I'm probably a bigger IPv6 proponent than just about anybody,
> > but I don't think it's going to be realistic to do v6-only for 
> > quite some time.
> > 
> > At the very least, some lagacy NATted IPv4 connectivity will be
> > needed.
> 
> 
> Sorry for the delayed response.
> 
> I just don't think this is acceptable in the current climate.  If we still ne
> ed v4 all the way down to the end-user, why bother with v6 at all?  If v6-onl
> y networks don't work acceptably, then there won't be any v6-only networks sp
> ring up in the near future (e.g. what some are predicting in developing count
> ries with no v4 available) and so there will be no need for any of us to even
>  make our services available on v6.  What a vicious circle.

If the world had taken the offered advice a decade ago and started
deploying IPv6 networks we would be in a position to run IPv6 only
access networks now.  IPv4 would have been relegated to internal
connections to legacy equipement.  The lack of IPv6 support would
have been found and fixed a long time ago.

Because the world didn't, lots of people are now trying to make
their systems work with IPv6.  This takes *time*.  You have to find
the problem, the develop and deploy a fix.  Now rince and repeat
until you have a working IPv6 system.  In addition ISPs are having
to deploy more specialised equipement to keep IPv4 limping along
until.  This means install CGN's of various flavours until most of
the services on the net are available over IPv6 as well as IPv4.
What type of CGN you deploy depends on what your client population
supports.

	NAT444 / DS-Lite / 4rd / NAT64

All of these are used to share public IPv4 addresses between customers
and as a result will break some of the things your customers do.

With IPv6 addresses don't need to be share between internally by a
customer, let along shared between customers.

Deploying IPv6 only is trying to run before you can walk.

> On 19/07/2012, at 8:16 PM, Don Gould wrote:
> > Ok... so building 'my new project', I'll just set up the NATv4 and put off 
> the v6 stuff, like everyone else is doing, till the time is right...
> > 
> > I'm really really starting to wonder if we're taking this v6 stuff seriousl
> y at all or just going to spend the next decade getting smarter and smarter a
> t using v4.
> 
> Exactly!
> 
> Which is a shame, because deploying an IPv6-only network using a different mi
> ndset to IPv4 has such an 'unrestrained' feel to it.  :)
> 
> Tom
 
-- 
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: marka at isc.org