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Mike Hammett
Intelligent Computing Solutions
http://www.ics-il.com

Midwest-IX
http://www.midwest-ix.com

From: "Baldur Norddahl" <baldur.norddahl@gmail.com>
To: nanog@nanog.org
Sent: Wednesday, May 15, 2019 6:43:30 AM
Subject: BGP prefix filter list

Hello

This morning we apparently had a problem with our routers not handling
the full table. So I am looking into culling the least useful prefixes
from our tables. I can hardly be the first one to take on that kind of
project, and I am wondering if there is a ready made prefix list or similar?

Or maybe we have a list of worst offenders? I am looking for ASN that
announces a lot of unnecessary /24 prefixes and which happens to be far
away from us? I would filter those to something like /20 and then just
have a default route to catch all.

Thanks,

Baldur