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Re: /24s run amuck
Frank Louwers writes: > On Tue, Jan 13, 2004 at 04:12:13PM -0500, Patrick W. Gilmore wrote: > Filtering on a /20 or whatever (up to /24) is a bad thing because > RIPE (and maybe APNIC) actually gives out /24 PI space, that comes > out of RIPE's /8's, not your upstream's /20 or /16 or /whatever... Yes, but those PIs are allocated from specific sub-ranges that are documented. So you can still filter MOST of the space by allocation boundaries, and accept /24 only in the "PI" ranges. We do this. This is RIPE-specific (we aggregate most non-RIPE routes under 0.0.0.0/0), but other RIRs may have similar policies, although probably with easier-to-find PI swamp ranges. -- Simon.