Hi.
It would be useful to know what size blocks the major US backbone providers see as viable entries. Currently they will accept a /24 but I've seen numbers like /18 or /19 bandied around in the past as the size of blocks that will be routable on the backbone for the forseeable future. (I recall Sprint for example saying that they would support blocks of this size.)
Well Sprint only accepts /24 in historical ranges (to which the NZGATE addresses belong). Current practice seems to be to filter at the minimum allocation size for the /8's. For all new and assignments in the recent past this seems to be /19 (from all registries), for older addresses this was /24. Because of the dramatic slowdown in router table growth, there doesn't seem to be any forseeable technical reason to have to alter current practice. Should growth threaten to become unmanagable, increasing the minimum allocation size to /18 or /17 could slow growth, without having to attempt to retroactively assume a new minimum allocation size. It's difficult to retroactively try to filter out routes shorter than the minimum allocation size at the time they were issued as this results in cutting onself off from too much of the Internet. And so for commercial reasons this has not happened (except perhaps briefly) and cannot be reasonably expected to happen. I cannot find information at APNIC for what they consider to be the minimum allocation sizes for 202/8 nor 203/8 -- something we should find out and (attempt to) correct if desirable/necessary. -Craig --------- To unsubscribe from nznog, send email to majordomo(a)list.waikato.ac.nz where the body of your message reads: unsubscribe nznog