[50636] in North American Network Operators' Group
RE: Deaggregating for emergency purposes
daemon@ATHENA.MIT.EDU (E.B. Dreger)
Tue Aug 6 14:38:36 2002
Date: Tue, 6 Aug 2002 18:38:19 +0000 (GMT)
From: "E.B. Dreger" <eddy+public+spam@noc.everquick.net>
To: nanog@merit.edu
In-Reply-To: <!~!UENERkVCMDkAAQACAAAAAAAAAAAAAAAAABgAAAAAAAAA/zNkI7d3EEmn3+v5DgN/l8KAAAAQAAAAjLc9Q8rjJkuLQ8aVIRm86AEAAAAA@isprime.com>
Errors-To: owner-nanog-outgoing@merit.edu
PR> Date: Tue, 6 Aug 2002 14:12:41 -0400
PR> From: Phil Rosenthal
PR> I only have 10 /24's that are absolutely mission critical to
PR> keep up. We have scaled back our IP usage, and we are a lot
PR> more efficient than we were before about the IP space.
So explain how this is superior to DNS entr(y|ies) stating who
your peers and upstreams are. And there's nothing to say that
one could not specify allowed filters in DNS, too.
If someone wants me to advertise 192.168.7/24, and DNS indicates
the proper netblock is 192.168.0/19 and their ASN is not origin
or adjacent hop, I'll be suspicious. What I do from there
becomes a policy question; I probably would contact the IP block
owner to verify the request.
PR> We are pretty well connected, so I would bet we would have a
PR> shorter AS path than many other networks (particularly ones
PR> that would make a mistake like that).
I see. Clueless and malicious people never buy from the big
ASNs. If said large ASNs don't filter, you still have a problem.
If they do, your problem is closer to the edge... the as-path to
reach the "real" you will be longer than the imposter at those
points.
Eddy
--
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Bandwidth, consulting, e-commerce, hosting, and network building
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