Re: IPv6 /64 links (was Re: ipv6 book recommendations?)

[Owen DeLong <owen () delong com>]

On Jun 21, 2012, at 5:36 PM, valdis.kletnieks () vt edu wrote:

> On Fri, 22 Jun 2012 08:40:02 +0900, Masataka Ohta said:
> > Owen DeLong wrote:
>
> > > What if my ISP just routes my /48? Seems to work quite well,
> > > actually.
> >
> > Unlike IPv4 with natural boundary of /24, routing table
> > explosion of IPv6 is a serious scalability problem.
>
> Do you have any *realistic* and *actual* reason to suspect that the IPv6
> routing table will "explode" any further than the IPv4 has already? Hint -
> Owen's /48 will just get aggregated and announced just like the cable companies
> *already* aggregate all those /20s of customer /32s. Unless Owen multihomes - at
> which point he's a new entry in the v6 routing tables - but *also* almost
> certainly a new entry in the v4 routing table.  Routing table size depends on
> the number of AS's, not the amount of address space the routes cover.

Um, unlikely. My /48 is an ARIN direct assignment: 2620:0:930::/48

It's not really aggregable with their other customers.

I do multihome and I am one entry in the v6 routing tables. However, I'm actually
two entries in the v4 routing table. 192.159.10.0/24 and 192.124.40.0/23.

Owen