On 14 January 2013 09:46, hannah commodore <hannah@tinfoilhat.net> wrote:
the various ipv6 rfcs require a /64 for host subnets. you should ever further divide a /64, except in rare circumstances like point to point links.
the rfcs also suggest a minimum of /56 per customer, and /48 for larger sites and provider-independent (PI) allocations.
Plus, if you have both wired and wifi networks, it is good practise to have them on separate networks. So a single /64 might be insufficient even for typical home use. Or if it is sufficient, there is no room for future expansion.
Typical home use would normally demand that everything is on the same layer 2 network, or the various media devices don't talk to each other as there are many implementations of UPnP that use TTL=1 for their multicast packets meaning they can't cross a router without some funky NAT/mangle rules (I do this at home for my blu-ray player so the android remote control app works). A /64 for typical home use will be just fine for now. James