Hello Reinaldo,

On Thu, Apr 23, 2009 at 12:27:21PM -0400, Reinaldo Penno wrote:
> Yes, they have a mapping mechanism. Please read
> draft-penno-alto-protocol-01.txt.

| Applications can already map IPs to ASNs using information from a BGP
| Looking Glass.  To do so, they must download a file of about 1.5MB
| when compressed (as of October 2008, with all information not needed
| for IP to ASN mapping removed) and periodically (perhaps monthly)
| refresh it.

This sounds rather vague to me ... which protocol do I have to use for
download from which address? Which file format is it, i.e., what kind
of parser do I need?

As your protocol proposal is based on HTTP anyway why not just always
offer the file for download from the ALTO server?

| Alternatively, the GetNetworkMap interface defined in this document
| could be extended to map ASNs into a set of IP prefixes.  The
| mappings provided by the ISP would be both smaller and more
| authoritative.

This option sounds better to me.

Thanks,
Sebastian


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Sebastian Kiesel            mailto:[email protected]
Network Research Division   tel:+49-6221-4342-232   fax:+49-6221-4342-155
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