owner-nanog@merit.edu wrote on 10/15/2007 01:09:08 AM:

>
> I have a few customers' customers, who appear at a local IX.  Due to
> the MLPA-like nature of the IX, I hear their prefixes both at the IX
> and via my own transit customers.  I normally use localpref to prefer
> customer advertisements over peers' advertisements.
>
> There is a customer's customer who is advertising more-specifics at the
> IX (and using a different source AS, to boot).  I can think of a couple
> ways to prevent hearing these, but thought I should ask for suggestions
> first.
>
> -Bradley
>
>
>
Sounds like misconfiguration.  Have you tried contacting them and explaining the problem?