26 Mar
2008
26 Mar
'08
12:34 p.m.
True. There are the same number of /19s, /20s, etc. in IPv6 as there are in IPv4... (I find it odd that some people don't seem to get this).
Maybe a better way to explain it is that there are the same number of /32s in IPv6 as IPv4. But instead of assigning a /32 to a single device, in IPv6 we allocate it to a single ISP who can then make /48 allocations to 64k customer sites which can then address everything in that site including the light switches. As you can see, IPv6 makes much better use of a /32 than IPv4 does. --Michael Dillon