nanog mailing list archives

Re: Prepending


From: William Herrin <bill () herrin us>
Date: Tue, 18 Oct 2022 08:29:19 -0700

On Tue, Oct 18, 2022 at 4:59 AM Sandoiu Mihai <Mihai.Sandoiu () wwz ch> wrote:
We have witnessed a lot of prepending in the last days, we got a few internet routes that have 30…200 prepends, did 
you face the same issue?

Hi Sandoiu,

Not a direct answer to your question, but broadly speaking any route
with an AS path longer than the Internet is hops wide is a mistake
that can be safely filtered from your routing table. That's somewhere
around 64.

Regards,
Bill Herrin


-- 
For hire. https://bill.herrin.us/resume/


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