In message <482678376.131852.1412829159356.javamail.zim...@snappytelecom.net>, Faisal Imtiaz writes: > > A /60, /56, /52 or /48 allows the client to run multiple SLAAC > > subnets (16, 256, 4096 or 65536) and to have the reverse ip6.arpa > > zone delegated on a nibble boundary. > > Understood... > > > There is plenty of address space even handing out /48's to everyone. > > Also Understood. > > >Only short sighted ISP's hand out /56's to residential customers. > > I am curious as to why you say it is short sighted? what is the technical or > otherwise any other reasoning for such statement ?
256 is *not* a big number of subnets. By restricting the number of subnets residences get you restrict what developers will design for. Subnets don't need to be scares resource. ISP's that default to /56 are making them a scares resource. Mark > Faisal Imtiaz > Snappy Internet & Telecom -- Mark Andrews, ISC 1 Seymour St., Dundas Valley, NSW 2117, Australia PHONE: +61 2 9871 4742 INTERNET: ma...@isc.org
