Prepending with another ASN you don't own

Jon Lewis jlewis at lewis.org
Fri Dec 16 22:22:31 UTC 2016


On Fri, 16 Dec 2016, Randy Bush wrote:

> this is called path poisoning.  an italian friend used it in his phd
> thesis.  a few friends and i used it to detect use of default across
> the internet.

I've done this in the past as a work-around for insufficient BGP community 
support.  Just prepending the AS I wanted to ignore the paths.

But, if the problem is an anycast CDN choosing a sub-optimal path to reach 
you, you might try reaching out to them.  They're probably just as, if not 
more interested, in getting their traffic to you as efficiently as 
possible.

----------------------------------------------------------------------
  Jon Lewis, MCP :)           |  I route
                              |  therefore you are
_________ http://www.lewis.org/~jlewis/pgp for PGP public key_________


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