Some advice on IPv6 planning and ARIN request, please

valdis.kletnieks at vt.edu valdis.kletnieks at vt.edu
Sun Jul 9 01:40:01 CST 2017


On Sat, 08 Jul 2017 18:59:36 +0200, "Radu-Adrian Feurdean" said:

> Now please show be a hotel room that has close to 65536 items in it
> (also tell me how much does a night in such a room cost).
> Then how many rooms may host close to 256 devices that can transmit and
> receive data ?

Well, as I sit here, my apartment edge router gets a /60 from Comcast, and
burns through them pretty quick.  A subnet for the 4 wired devices,
another for the 2.4Ghz wireless, another for 5ghz wireless, and if I
enabled them another 2 guest wireless subnets.. and then more for any
VLAN I might set up. If I lived in a large enough house, I'm *already*
out of enough address space to easily prefix-delegate to a second router
at the far end of the house.

And yes, this *is* a setup where there's only 1 or 2 devices per most subnets.

So no, the idea is *not at all* to see how we can cram as many devices as
possible onto a subnet.  The idea is to set up a networking environment where
it's as easy as possible for even fairly stupid devices to be able to
auto-configure and join in.  And there's *really* good security reasons
for your FizzBin 5000 that wants to be a IoT device but you don't really
trust, to end up on a different subnet from your laptop....
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