* v...@mpeks.tomsk.su (Victor Sudakov) [Sun 20 Nov 2016, 03:07 CET]:
I have reports that in case (2), some operators (e.g. Rostelecom)
don't accept the /24 or even /23 prefix on the grounds that it is
part of a larger /19 route already present in the routing table.
Could they have a reason not to accept these more specific prefixes
other than a whim?
If you announce a prefix you must deliver traffic sent to addresses
covered by it. You don't go announcing 0.0.0.0/0 to your peers either.
If a customer takes a /24 and announces it elsewhere, a transit
provider runs the risk of accepting inbound traffic without having
the possibility to bill their customer for it if it accepts more
specifics from e.g. a peer.
-- Niels.