nanog mailing list archives

Re: Consistent routing policy?


From: Mark Tinka <mark.tinka () seacom mu>
Date: Tue, 17 Sep 2019 13:43:37 +0200



On 16/Sep/19 21:55, Töma Gavrichenkov wrote:



The point is that you must expect inbound traffic to any prefix you
advertise to the outside world, even a more specific announcement is
also being advertised.  There are legitimate circumstances where an
ISP would prefer the super-block.

It's not about the business reasons for wanting it, it's about what the
router does if it's presented with the options.

Like I said before, you can do things to your network to prevent your
router from installing a longer prefix. But if you do not, the longer
prefix will always be installed and used, first.

Mark.


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