[110614] in North American Network Operators' Group
Re: Anyone notice strange announcements for 174.128.31.0/24
daemon@ATHENA.MIT.EDU (Joe Abley)
Mon Jan 12 16:12:11 2009
From: Joe Abley <jabley@hopcount.ca>
To: Florian Weimer <fw@deneb.enyo.de>
In-Reply-To: <87k590xnqy.fsf@mid.deneb.enyo.de>
Date: Mon, 12 Jan 2009 16:12:02 -0500
Cc: nanog@nanog.org
Errors-To: nanog-bounces@nanog.org
On 2009-01-12, at 15:39, Florian Weimer wrote:
> So does "academic" mean "unethical" these days?
>
> I think this is over the line. You can't put other people's IDs into
> routing data on production networks. (Well, technically you can,
> obviously, but you shouldn't.)
The AS_PATH attribute is a loop-avoidance mechanism, not a signature
on a cheque.
AS_PATH prepending with your own and with others' AS numbers (the
latter intended to effect "don't let this prefix leak into that AS")
has been sitting in the inter-domain traffic engineering toolbox for
years.
I see no lack of ethics in the simple act of the as-path prepend as
part of a route export policy.
Joe
