> Larry Kuenning <la...@qhpress.org> kirjoitti 11.01.2017 kello 21:20: > > Excuse my ignorance, but isn't this whole discussion of "/128" based on the > assumption that this notation means a block of 2^128 addresses? And isn't > 2^128 the size of the entire IPv6 address space? There would be nothing left > over after designating a block of that size. > > Doesn't "/128" mean a block of 2^7 addresses, i.e. just 128?
OT, but in short: /128 means the count of ones in the bitmask. For IPv6 /128 means a single address - like /32 means in IPv4. The ones in the bitmask denote the bits belonging to the address provider upstream (e.g. ISP). /128 means all of the bits are out of your hands, you have only a single address. I have /64 which means I can subnet the last 64 bits as I see fit. -- Cheers Petri GSM +358 400 505 939
