Hi, On Mon, May 28, 2007 at 11:12:34PM -1000, Randy Bush wrote:
Randy Bush wrote:
ULA space should be !A'ed out by routers per default and have a special switch to enable forwarding for them. oh, site-local. i remember that disaster. no wonder the internet-draft was stuffed.
RFC 1925 2(11) ?Every old idea will be proposed again with a different name and a different presentation, regardless of whether it works.?
Actually there is a difference - site-locals are not unique between different sites that might be linked privately, eventually. I wasn't there when site-local was killed, but from what I understand, the "uniqueness" and "where is a site border?" arguments where the ones that people had most issues with. ULAs do solve this - but indeed, having PI space easily available would take away the need for "give me internal addresses that I do not want to see globally routed". OTOH, folks are afraid of PI, so ULAs are a possible answer to the question "how can I get address space for internal use, which is never meant to be visible on 'the global Internet'?". I agree with you that any sort of "hard-code filter in router software" is something to recommend to your competition :-) (after all, even if ULAs are not supposed to be "globally" routable, they *are* supposed to be used for private connetions between enterprises, and how is the router supposed to tell the difference?). Gert Doering -- APWG chair -- Total number of prefixes smaller than registry allocations: 113403 SpaceNet AG Vorstand: Sebastian v. Bomhard Joseph-Dollinger-Bogen 14 Aufsichtsratsvors.: A. Grundner-Culemann D-80807 Muenchen HRB: 136055 (AG Muenchen) Tel: +49 (89) 32356-444 USt-IdNr.: DE813185279