At 05:23 PM 1/15/2013, Jeremy Visser wrote: >On 13/01/13 20:05, Tony Langdon wrote: > > A /64 should do most home networks. > >Where most doesnt include power users. A /64 cannot be divided any
Well, since when are power users in the majority? I stand by "most". >A fair few non-power users use multiple subnets without realising it >all the time I come across people who have purchased a wired-only ADSL >modem, and put a wireless router behind it. Thats two (currently IPv4, >could become IPv6 if CPE one day supports sub-DHCPv6-PD) subnets right >there. A lot of that ugliness comes from NAT. Plug it in, it works.... until someone wants to use an application that requires port forwarding, then it all breaks. >(If youve ever wondered why most ADSL modem/routers default to >192.168.1.0/24, and most non-ADSL routers default to 192.168.2.0/24, >this is the precise use case in mind.) Encouraging the ugliness to continue. Will be interesting to see how IPv6 devices cope with this. >Im a power user, and have used 5 × /64s out of my /56 at various >stages. So a /60 would do me nicely, but I can think of a couple of my >own clients who are approaching 16 separate subnets. A /56 would be >needed for them. I was like that, I've flattened my networks to a single subnet as time goes by. Reason being it makes it more "user friendly" for anyone else here. >Its easier to estimate IP allocation growth when you have to deal with >x number of customers, rather than needing to separately deal with >business/residential trends if you are delegating different sized >subnets to each demographic. > >In other words, its much easier to just give a /56 to everyone. Youve >gotta pick your battles. Squeezing 100% efficiency out of your IP >allocations isnt one I want to fight. That might be the easiest way. The best flexibility is if ISPs offer a /64 by default, but allow power users to request a /56. Cases such as cascaded routers would be better handled by smarter devices that only act as routers when they have to. Not sure how that would be achieved, would require a bit of thought. 73 de VK3JED / VK3IRL http://vkradio.com _______________________________________________ luv-main mailing list [email protected] http://lists.luv.asn.au/listinfo/luv-main
