Subject: RE: [v6ops] Could IPv6 address be more than locator?//draft-jiang-v6ops-semantic-prefix-03

From: "Manfredi, Albert E" <[email-masked]>
Date: Mon, 3 Jun 2013 00:13:46 +0000

> -----Original Message-----
> From: Brian E Carpenter [mailto:[email-masked]]

> Advertised where? Vehicle prefixes will need to be heavily aggregated anyway,
> so you wouldn't see anything as long as a car's /48 in BGP.
> 
> Dark space is a fact of life when you have lots of address space, isn't it?

Yes, of course we need to promote aggregation. Seems to me that it's hard to predict the future of this IoT thing, and that 48-bit prefixes are ultimately way more limiting than they should be, while the 64-bit IIDs are way more generous than they need to be.

It seems to be that localized hierarchical nets are going to become the norm. A number that makes sense to me would be, for example, 16-bit IIDs. Still a huge number of local hosts in the sub-sub net (e.g. the steering control system), but then that entire vehicle and all its subnets could be given a /64. Easily.

I suppose that a local DHCPv6 server could take care of this anyway, though. So maybe there's no problem.

Bert