The kind of painfully obvious solution, especially when we consider the effects 
of the much-ballyhooed "Internet of Things," is that we have to allow for 
prefixes > /64.

It's not just home nets. What about automobile nets, or more generically, 
"vehicle nets"? Are we going to try to rationalize why every vehicle on the 
road, sea, or sky  should also be given a /48, because after all, for sure each 
subsystem in that vehicle will also need to be able to have its own 
hierarchical subnet structure?

I think the time has come for even something like SLAAC to be modified, to 
accommodate IIDs less than 64 bits. And isn't it convenient that the original 
idea of creating IIDs out of MAC addresses has lost favor in recent years?

Egregious waste of resources, in this case IPv6 address space, should make 
people uncomfortable. I think we need what amounts to CIDR, applied this time 
to IPv6.

Bert


From: ipv6-boun...@ietf.org [mailto:ipv6-boun...@ietf.org] On Behalf Of Owen 
DeLong
Sent: Sunday, June 02, 2013 12:39 PM


You just said exactly what I said to begin with... It's to have a bit field 
wide enough to allow flexibility in the automation of the hierarchical 
assignments, not to create 65K subnets. I never asserted it was because we 
needed 65K subnets.


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