In message <4d4ca1b1.5060...@brightok.net>, Jack Bates writes: > On 2/4/2011 6:45 PM, Mark Andrews wrote: > > > > I used to work for CSIRO. Their /16's which were got back in the > > late 80's will now be /48's. > > That's why I didn't try doing any adjustments of X is the new /32. The > whole paradigm changes.
So why the ~!#! are you insisting on comparing IPv4 allocations with IPv6 alocations. > Many ISPs devote large amounts of space to > single corporate network sites. Those sites will now have a single /48. > On the other hand, we currently give /32 to residential customers. They > also are getting a /48. > > Which is why the only way to consider address usage from an ISP and RIR > perspective is by how it is handed to a standard ISP of a given size. There are two sizes. Those that fit into a /32 and those that don't. The latter ones have to justify their allocations. > Originally, ARIN was being overly restrictive and it was "/32 for every > ISP". They have loosened up, and will continue to do so (including ISP > to ISP) as future proposals come to fruition. So from an ISP > perspective, you have to consider your total IPv6 allocation size > (within the first 32 bits of IPv6) in comparison to your total IPv4 > allocations summed. No. You need to compare it to the number of customer sites. If you have 1 customer with wires going to two locations thats two /48's. > From what I can tell, on average, all ISPs are shifting between 8 and > 16 bits to the right from their total IPv4 size depending on their > primary customer type (residential ISPs shift less than ISPs that > primarily only service corporations). Residential ISPs shift 16 bits (48-32=16). You shift less if you have less than 64000 customers sites and don't get address space from a larger ISP. Commercial ISPs shift more as what was multiple address at one sites becomes 1 /48. Mark -- Mark Andrews, ISC 1 Seymour St., Dundas Valley, NSW 2117, Australia PHONE: +61 2 9871 4742 INTERNET: ma...@isc.org
