nanog mailing list archives
Re: Origin ASN seen vs Origin ASN in Whois Records Report?
From: Stephen Sprunk <stephen () sprunk org>
Date: Sun, 23 Nov 2008 20:17:32 -0600
Joe Abley wrote:
On 19 Nov 2008, at 19:16, Heather Schiller wrote:ARIN makes available a list of prefixes with OriginAS. I don't know if other RIR's do.How is that list generated?I'm not aware of any tight coupling between address assignment and AS assignment that binds anybody to advertise particular routes with particular origins, at least at the time that either is assigned/allocated by an RIR/LIR.
Presumably it's from the "Origin AS" field in WHOIS: http://www.arin.net/registration/templates/netmod.txt Template: ARIN-NET-MOD-4.1 ** As of February 2007 ** Detailed instructions are located below the template.01. Registration Action (M or R): 02. IP Address and Prefix or Range:
03. Network Name: 04. Origin AS: ... 04. List all AS numbers from which the network may originate.You can list as many AS numbers as necessary. You must separate multiple AS numbers with a comma. You may not list AS number ranges; only list individual AS numbers.
Interesting is how accurate the field actually is. Slide 6 at: http://www.arin.net/meetings/minutes/ARIN_XXII/PDF/friday/engineering_report.pdfsays that 91% of the routes they checked had a correct Origin AS in WHOIS, compared to 64% in the ARIN IRR database.
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Current thread:
- Origin ASN seen vs Origin ASN in Whois Records Report? Heather Schiller (Nov 19)
- Re: Origin ASN seen vs Origin ASN in Whois Records Report? Bill Woodcock (Nov 19)
- Re: Origin ASN seen vs Origin ASN in Whois Records Report? Bill Woodcock (Nov 21)
- Re: Origin ASN seen vs Origin ASN in Whois Records Report? Bill Woodcock (Nov 21)
- Re: Origin ASN seen vs Origin ASN in Whois Records Report? Joe Abley (Nov 23)
- Re: Origin ASN seen vs Origin ASN in Whois Records Report? Stephen Sprunk (Nov 23)
- Re: Origin ASN seen vs Origin ASN in Whois Records Report? Joe Abley (Nov 23)
- Re: Origin ASN seen vs Origin ASN in Whois Records Report? Heather Schiller (Nov 24)
- Re: Origin ASN seen vs Origin ASN in Whois Records Report? Joe Abley (Nov 24)
- Re: Origin ASN seen vs Origin ASN in Whois Records Report? Stephen Sprunk (Nov 23)