On Mon, Sep 26, 2005 at 05:46:34PM -0500, sjk wrote:
On Mon, 26 Sep 2005, Vicky Rode wrote:
Is there a minimum address space (?) an entity would need to justify to go directly to RIR (ARIN in this case) as opposed to the upstream provider? Is /20 the minimum allocation? Can my client approach RIR and request for a /23?
If my client do procure a /23 how do they make make sure that this address space will be globally routable?
They can't really make *sure* of it, any more than with any other prefix.... I think there is language to that effect somewhere. That said, I think ARIN does try to allocate these smaller allocations from a block that is less likely to be filtered (by most networks).
Yes, minimum assignment is /20 (and this is considered temporary, as the official minimum is /19) -- there used to be some experimental /24s, but I believe these are now gone. ARIN will only assign /20 or more -- larger prefixes must come from your upstream provider.
Could be wrong, but my understanding is that they will allocate a /22 or shorter when the requesting org is multihomed. http://arin.net/policy/nrpm.html#four222