up_the_irons - http://www.rfc-editor.org/rfc/bcp/bcp157.txt ipv6 address assignment recommendations recently updated Interesting. backing off on the /48 rule but firm on /64 per segment and saying "no more /128 please" Makes sense. I'd think a place like arp would hand out /56 as a happy compromise between /48 and /64 still plenty-o-nets :) Yeah I think I'm using 1 address. Heh. I'd like it if people would agree on a max routable prefix-length for v6 preferrably something longer than a /32 RandalSchwartz: the /48 vs /56 debate has gone on a long time; i still think making the differentiation between "well, this is a 'big' customer, give him more IPv6 space (/48); and this is a 'small' customer, give him less IPv6 space (/56)", is still IPv4-centric thinking if we do, /32 - ISP, /48 - Customer of ISP, /64 - subnet of customer of ISP, we get a *lot* simpler addressing schemes and simple means less errors and therefore less costly I think the purpose of that recent memo though is to not bake those numbers into code, in case the assumption is false (except for /64) and also to deprecate /128 yeah, i never bought into /128 just saw that comment about a fear of going back to classful addressing i dunno, in the end, that's not much of a case alone; but i'll read the whole thing and then decide it also bugs me a little that a /56 doesn't end on a ":" boundary ;) true " For example, a large business (which may have thousands of employees) would, by default, receive the same amount of address space as a home user, who today typically has a single (or small number of) LAN and a small number of devices (dozens or less). " i can see the logic here :D yeah, i can respect the /56 a little more but it begs the question -- in an IPv6 world, does that distinction actually matter? does the term "waste" even apply anymore? geez, i still can't grasp the concept of /24 /48... etc up_the_irons: my view is, for commercial ISPs (not hosting providers) the default for home customers should be /56 up_the_irons: my rationale, is that customers generally don't need to subnet or anything funny like that, the max the average home user needs is 2 (depending on deployment, you'd have the home network, + the link to the ISP being the second), it's only crazy people like me, that have subnetted their home network into about 5 different subnets hi up_the_irons here?