On Mon, 2012-07-16 at 22:04 -0400, Lee wrote:
Each site gets a /48. Even the ones with less than 200 people. [...] Which is *boring*. Nothing novel, no breaking out of "IPv4 think" aside from massively wasting address space.
It's only a waste if you get nothing for it. By using /64 everywhere you get a more homogeneous network, easier to administer, manage, document, maintain... There are similar advantages, writ larger, to using /48 for every site. Whether you have 2, 20, 200, 2000 or 20,000 hosts in a /64 subnet, you have still only used 0% of it, to a dozen or more decimal places. IPv4-think says that's a waste. IPv6-think says "great - all my subnets are large enough". Resizing IPv4 subnets is common; resizing IPv6 subnets will be rare. IPv4-think is conserving addresses. IPv6-think is conserving subnets. We don't buy dining chairs based on the number of atoms in them - we buy enough to seat the people who need seating. Regards, K. -- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Karl Auer (kauer@biplane.com.au) http://www.biplane.com.au/kauer GPG fingerprint: AE1D 4868 6420 AD9A A698 5251 1699 7B78 4EEE 6017 Old fingerprint: DA41 51B1 1481 16E1 F7E2 B2E9 3007 14ED 5736 F687