nanog mailing list archives
Re: Addressing plan exercise for our IPv6 course
From: Mark Smith <nanog () 85d5b20a518b8f6864949bd940457dc124746ddc nosense org>
Date: Sat, 24 Jul 2010 15:20:46 +0930
On Fri, 23 Jul 2010 13:26:43 -0700 Matthew Kaufman <matthew () matthew at> wrote:
sthaug () nethelp no wrote:It is not about how many devices, it is about how many subnets, because you may want to keep them isolated, for many reasons. It is not just about devices consuming lots of bandwidth, it is also about many small sensors, actuators and so.I have no problems with giving the customer several subnets. /56 is just fine for that./56? How about /62? That certainly covers "several"... and if you're really worried they might have too many subnets for that to work, how about /60?I haven't seen any kind of realistic scenarios which require /48 for residential users *and* will actually use lots and lots of subnets - without requiring a similar amount of manual configuration on the part of the customer. So we end up with /56 for residential users.Only because people think that the boundaries need to happen at easy-to-type points given the textual representation. /56 is still overkill for a house. And there's several billion houses in the world to hook up.
So you're also strongly against 48 bit Ethernet MAC addresses? Dropping the two bits for group and local addresses, that's 70 368 744 177 664 nodes per LAN. How ridiculous! What were those idiots+ thinking! "48-bit Absolute Internet and Ethernet Host Numbers", by Yogan K. Dalal, Robert S. Printis, *July 1981* http://ethernethistory.typepad.com/papers/HostNumbers.pdf + not actually idiots
Current thread:
- Re: Addressing plan exercise for our IPv6 course, (continued)
- Re: Addressing plan exercise for our IPv6 course Jens Link (Jul 25)
- Re: Addressing plan exercise for our IPv6 course Joe Maimon (Jul 22)
- Re: Addressing plan exercise for our IPv6 course Marco Hogewoning (Jul 23)
- Re: Addressing plan exercise for our IPv6 course Matthew Kaufman (Jul 23)
- Re: Addressing plan exercise for our IPv6 course JORDI PALET MARTINEZ (Jul 23)
- Re: Addressing plan exercise for our IPv6 course Matthew Kaufman (Jul 23)
- Re: Addressing plan exercise for our IPv6 course JORDI PALET MARTINEZ (Jul 23)
- Re: Addressing plan exercise for our IPv6 course todd glassey (Jul 23)
- Re: Addressing plan exercise for our IPv6 course sthaug (Jul 23)
- Re: Addressing plan exercise for our IPv6 course Matthew Kaufman (Jul 23)
- Re: Addressing plan exercise for our IPv6 course Mark Smith (Jul 23)
- Re: Addressing plan exercise for our IPv6 course Fred Baker (Jul 23)
- Re: Addressing plan exercise for our IPv6 course Owen DeLong (Jul 24)
- Re: Addressing plan exercise for our IPv6 course Karl Auer (Jul 23)
- Re: Addressing plan exercise for our IPv6 course Marco Hogewoning (Jul 23)
- RE: Addressing plan exercise for our IPv6 course Lee Howard (Jul 23)
- Re: Addressing plan exercise for our IPv6 course Karl Auer (Jul 22)
- Re: Addressing plan exercise for our IPv6 course Matthew Walster (Jul 29)
- Re: Addressing plan exercise for our IPv6 course Owen DeLong (Jul 29)
- Re: Addressing plan exercise for our IPv6 course Matthew Walster (Jul 29)
- Re: Addressing plan exercise for our IPv6 course Jordi Palet MartÃnez (Jul 29)