> On Aug 5, 2016, at 9:52 AM, Mark Tinka <[email protected]> wrote: > > > >> On 5/Aug/16 15:40, Soon Keat Neo wrote: >> >> If you are just announcing more specific address space that you've obtained >> legitimately off their assigned address space, it should be no problem, >> just obtain an LoA and register it on the different databases and you >> should be set to ask your upstreams to allow the announcements. > > Do people actually do this? A customer asked us to do this for them and > we refused, because inconsistent AS has never been a thing. > > I'm apprehensive about a subnet and its aggregate appearing from > multiple AS's at the same time. But, I'm old school, so... > > Mark.
I agree with you...not a great practice. Each AS should just announce the prefix that they actually use. The school could be used as a transit for the ISP, which may be undesirable.
