Peace, On Mon, Sep 16, 2019, 12:04 PM Owen DeLong <o...@delong.com> wrote:
> For any router which receives both announcements, longest match always > wins over all other BGP tie-breaking criteria. > > This is almost always summarized as “Longest Match always wins” because > virtually any engineer recognizes that the > winner is selected only from the available contestants, not from unknown > distant contestants not present at the router > in question. > 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. -- Töma
