[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Consistent routing policy?
On 16/Sep/19 20:26, TÃ¶ma Gavrichenkov wrote:
> Not always.
No, longest match ALWAYS wins.
> 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.Â Therefore, an advertisement from the IX would always win no
> matter the length.
Which is why I included, in my previous message:
Â Â Â So, for example, if the upstream to whom you are sending the /21 doesn't
Â Â Â do anything about how they learn the /22 from another source, (for their
Â Â Â network)...