On Wed, Jan 16, 2019 at 15:24 Randy Bush <randy@psg.com> wrote:
> Do you use AS0 as origin on the RPKI objects for said exchange point
> LAN(s) to prevent route propagation?

but as0 does not exactly do that as it can be overridden by a different
roa for the same prefix.  as0 is pretty useless.

Why would the IXP create such a second ROA?

Do you mean to say “a tool can be useless when applied incorrectly”?