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Re: Anyone notice strange announcements for 174.128.31.0/24
From: "Patrick W. Gilmore" <patrick () ianai net>
Date: Mon, 12 Jan 2009 16:16:00 -0500

On Jan 12, 2009, at 4:12 PM, Joe Abley wrote:
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.

People have been doing it forever. However, it has been considered sketchy at best.

If this were not Randy doing a research project, but, say, Cogent prepending the ASN of $LATEST_DEPEERED_NETWORK on announcements to Verio, how different would the tone of this thread have been?

If A cannot / should not do it, then the same should go for B.

--
TTFN,
patrick



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