question about AS relationship

Ricky Beam jfbeam at
Thu Feb 20 22:25:33 UTC 2014

On Thu, 20 Feb 2014 03:14:59 -0500, Song Li <refresh.lsong at>  
> I have one simple question: as for AS relationship, should customer tell  
> its provider the AS# of its own customers, or the provider have the  
> right to require its customers to do that?

(Having been on both ends of this...)

If you want me to carry their traffic, yes, I need to know their address  
block(s) AND the ASN appearing behind yours.  I will, in turn, have to  
provide that to my upstream provider(s).

NOBODY should be blindly accepting routing information from ANYONE, EVER.   
That's how people appropriate address space.


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