BGP prefix filter list

Jon Lewis jlewis at
Wed May 15 14:11:58 UTC 2019

On Wed, 15 May 2019, Baldur Norddahl wrote:

> 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.

This may be too old to be terribly useful other than as a starting point, 
but we went through essentially the same thing a little more than 10 years 

  Jon Lewis, MCP :)           |  I route
                              |  therefore you are
_________ for PGP public key_________

More information about the NANOG mailing list