Rate of growth on IPv6 not fast enough?

William Herrin bill at herrin.us
Thu Apr 22 06:18:18 CDT 2010

On Wed, Apr 21, 2010 at 11:31 PM, Owen DeLong <owen at delong.com> wrote:
> On Apr 21, 2010, at 3:26 PM, Roger Marquis wrote:
>> William Herrin wrote:
>>>> Not to take issue with either statement in particular, but I think there
>>>> needs to be some consideration of what "fail" means.
>>> Fail means that an inexperienced admin drops a router in place of the
>>> firewall to work around a priority problem while the senior engineer
>>> is on vacation. With NAT protecting unroutable addresses, that failure
>>> mode fails closed.
>> In addition to fail-closed NAT also means:
>>  * search engines and and connectivity providers cannot (easily)
>>  differentiate and/or monitor your internal hosts, and
> Right, because nobody has figured out Javascript and Cookies.

Having worked for comScore, I can tell you that having a fixed address
in the lower 64 bits would make their jobs oh so much easier. Cookies
and javascript are of very limited utility.

On the other hand, I could swear I've seen a draft where the PC picks
up random unused addresses in the lower 64 for each new outbound
connection for anonymity purposes. Even if there is no such draft, it
wouldn't exactly be hard to implement. It won't take NAT to anonymize
the PCs on a LAN with IPv6.

>>  * multiple routes do not have to be announced or otherwise accommodated
>>  by internal re-addressing.
> I fail to see how NAT even affects this in a properly structured network.

That's your failure, not Roger's. As delivered, IPv6 is capable of
dynamically assigning addresses from multiple subnets to a PC, but
that's where the support for multiple-PA multihoming stops. PCs don't
do so well at using more than one of those addresses at a time for
outbound connections. As a number of vendors have done with IPv4, an
IPv6 NAT box at the network border can spread outbound connections
between multiply addressed upstream links.

On Thu, Apr 22, 2010 at 2:10 AM, Franck Martin <franck at genius.com> wrote:
> http://www.ipinc.net/IPv4.GIF
> The energy that people are willing to spend to fix it (NAT, LSN),
> rather than bite the bullet is amazing.

A friend of mine drives a 1976 Cadillac El Dorado. I asked him why
once. He explained that even at 8 miles to the gallon and even after
having to find 1970's parts for it, he can't get anything close to as
luxurious a car from the more modern offerings at anything close to
the comparatively small amount of money he spends.

The thing has plush leather seats that feel like sinking in to a comfy
couch and an engine with more horsepower than my mustang gt. It isn't
hard to see his point.

Bill Herrin

William D. Herrin ................ herrin at dirtside.com  bill at herrin.us
3005 Crane Dr. ...................... Web: <http://bill.herrin.us/>
Falls Church, VA 22042-3004

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