BGP Community - AS0 is de-facto "no-export-to" marker - Any ASN reserved to "export-only-to"?'

Chriztoffer Hansen ch at
Wed Sep 9 12:29:14 UTC 2020

On Wed, 9 Sep 2020 at 06:25, Mark Tinka via NANOG <nanog at> wrote:
> It's not unlike trusting your customers to send you FlowSpec
> instructions. No issues technically, but do you want to do it?

Why not? As a service offering, it makes total sense.

Thou, generally I agree with you. Trust, but verify any received
announcement conforms to a base-set of expectations. Discard



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