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Even for PI and swamp space, if the organization divides their space among different ISPs for multi-homed links. You still got a problem.

That is what I thought this thread was about?

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That is not the suggestion. See above. The assignments per block and RIR is well known.

Well known and lots of holes in it. That's the problem.

Uhm, say again? You mean that there are people that take address assignments with them when they change provider? I think that is a much larger problem than that of multihoming then...

I mean when a customer get a second link from a backup ISP using the same block from the primary ISP. Then it became a hole in the primary ISP's CIDR block. Ping Lu Cable & Wireless USA Network Tools and Analysis Group W: +1-703-292-2359 E: plu@cw.net