Re: [p2pi] ASN utility

[Marshall Eubanks <tme at multicasttech.com>]

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
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