Re: [p2pi] ASN utility

[David Ward <dward at cisco.com>]

Marshall -

I mentioned that this is one deployment model and is as it works  
today but, the charter is unclear if they want to support any other  
model. I do think it is considerably harder to deduce a current  
AS_path from simple prefix -> ASN information.

-DWard

On Oct 21, 2008, at 3:38 PM, Marshall Eubanks wrote:

> On Sep 29, 2008, at 1:54 PM, Lisa Dusseault wrote:
>
> > When the IESG looked at the proposed ALTO charter last week, Dave  
> > had some comments about ASNs which I'd like to follow up on by  
> > dragging Dave into the conversation.
> >
> > What I understand the ASN related suggestions so far to be, is to  
> > have the ALTO server return a list of ASN numbers to prefer or  
> > avoid.  This sort of information could only be provided by an ISP- 
> > operated ALTO server.
>
> Are you sure about that ?
>
> A peer can (for example) query route views, or I (or a host of  
> others) can send it BGP / address block tables. It would not be  
> hard to collate address information with ASN and ASN paths and draw  
> conclusions. I don't see why an ISP is necessarily involved.
>
> Regards
> Marshall
>
>
>
> > A peer, armed with this information, can do whatever they do today  
> > to figure
> > out which IP address falls in which ASN.  The P4P and Yale folks  
> > claim that returning a preference of ASNs helped their application  
> > tremendously.
> >
> > Dave, was your concern about discovering ASN being unnecessary, or  
> > about ranking of ASNs being unhelpful?  Can you restate?
> >
> > Thanks,
> > Lisa
> > _______________________________________________
> > p2pi mailing list
> > p2pi at ietf.org
> > https://www.ietf.org/mailman/listinfo/p2pi

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