[arin-discuss] IPv6 End User Assignments

[Dan White]

Garry Dolley wrote:

> But that 8192 possible customers is if you only give 1 IP per
> customer (/32) and you have one huge subnet (the /20 itself); isn't
> that a bit unrealistic?  I mean customers will want /29, /28's,
> etc...  no?  Most of my customers request more than 1 IP. 


I agree. I was trying to counter point the argument that a /32 IPv6 
assignment was not sufficient for a current ISP with an IPv4 /20 (give 
or take). Clearly it is more than sufficient in my scenario.

For IPv6, we need to think in terms of *customers*, not IP addresses. 
Today, a /20 represents < 4096 customers, but probably represents much 
less than that. In IPv6, a /32 represents 65536 customers assuming /48 
assignments.

> If you don't mind me asking, what kinds of applications / equipment
> / use-cases are you running in your household that would require
> more than 256 subnets?
>
>   


Me personally? I expect at some point my network to look roughly like:

a /64 for networking equipment/management
a /64 for trusted wireless connections
a /64 for friends'/visitors' wireless connections (maybe one per friend)
a /64 for mobile IPv6
a /64 for trusted wired connections (PCs)
a /64 for a server DMZ
a /64 for black boxes that I don't have OS level access to (toaters!). 
Potentially multiple /64s for these, since I may want layer two 
separation between them.

That's probably about as large as I can see getting.

But I'm not about to make any assumptions about other customers' 
connections, or how they may desire to subnet in the next 50 years. I 
have customers with multiple locations, which will require them to split 
their /48.

- Dan