On Aug 7, 2011, at 3:09 PM, Jonathon Exley wrote: > This has probably been said before, but it makes me uncomfortable to think of > everybody in the world being given /48 subnets by default. > All of a sudden that wide expanse of 2^128 IP addresses shrinks to 2^48 > sites. Sure that's still 65535 times more than 2^32 IPv4 addresses, but > wouldn't it be wise to apply some conservatism now to allow the IPv6 address > space to last for many more years?
2000::/3 is 1/8th of the address range. There are other things worth conserving not just /48s like the ability aggregate your whole assignment. 3.5 * 10^13 is a lot of /48s, but it's likely not enough so we'll get to crack the seal on 4000::/3 eventually and so on. > After all, there are only 4 bits of IP version field so the basic packet > format won't last forever. > > Jonathon > > This email and attachments: are confidential; may be protected by > privilege and copyright; if received in error may not be used,copied, > or kept; are not guaranteed to be virus-free; may not express the > views of Kordia(R); do not designate an information system; and do not > give rise to any liability for Kordia(R). > > > >
