Re: Dual stack IPv6 for IPv4 depletion

[Owen DeLong <owen () delong com>]

> On Jul 9, 2015, at 09:16 , Matthew Huff <mhuff () ox com> wrote:
>
> When I see a car that needs a /56 subnet then I’ll take your use case seriously. Otherwise, it’s just plain 
> laughable. Yes, I could theorize a use case for this, but then I could theorize that someday everyone will get to 
> work using jetpacks.

When I see a reason not to give out /48s, I might start taking your argument seriously.

> We have prefix delegation already via DHCP-PD, but some in the IPv6 world don’t even want to support DHCP, how does 
> SLAAC do prefix delegation, or am I missing something else? I assume each car is going to be running as  RA? Given 
> quality of implementations of IPv6 in embedded devices so far, I found that pretty ludicrous.

Clearly the quality of IPv6 in embedded devices needs to improve. There’s clearly work being done on LWIP IPv6, but I 
don’t think it’s ready for prime time yet. (LWIP is one of the most popular embedded IP stacks. You’ll find it in a 
wide range of devices, including, but not limited to the ESP8266).

> Seriously, the IPv6 world needs to get a clue. Creating new protocols and solutions at this point in the game is only 
> making it more difficult for IPv6 deployment, not less. IPv6 needs to stabilize and get going.. instead it seems 
> everyone is musing about theoretical world where users need 64k networks. I understand the idea of not wanting to not 
> think things through, but IPv6 is how many years old, and we are still arguing about these things? Don’t let the 
> prefect be the enemy of the good.

/48s for end sites are NOT new… They have been part of the IPv6 design criteria from about the same time 128-bit 
addresses were decided. It is these silly IPv4-think notions of /56 and /60 that are new changes to the protocol.

The good news is that it’s very easy to deploy /48s and if it turns out we were wrong, virtually everyone currently 
advocating /48s will happily help you get more restrictive allocation policies when 2000::/3 runs out. (assuming any of 
us are still alive when that happens).


Owen