16 Sep
2019
16 Sep
'19
2:26 p.m.
Peace, On Mon, Sep 16, 2019, 6:06 AM Mark Tinka <mark.tinka@seacom.mu> wrote:
Longest match always wins... so provided your /22's are in the global table, traffic will follow the path toward them before the /21 is preferred.
Not always. E.g. imagine an ISP who has two connections to the outside world: one through a major ISP and the other through an IX. Such an ISP would be quite inclined both financially and technically to import routes just from the IX and set the default to the upstream ISP link. Therefore, an advertisement from the IX would always win no matter the length. There are more complicated cases as well. -- Töma