[lacnog] Blackhole announcements larger than /32

[Fernando Frediani]

Hello folks

I wanted to consult the community about a topic that has been around
for a while.
Normally when announcing prefixes to an Upstream it is commonly used
/32 only which works for a short amount of IP unused addresses but
when you or your Downstream customers have a larger amount to be
announced it starts to get a lot of prefixes in that BGP session.

What downsides do you see in companies allowing announcements marked
with the blackhole community (or through a dedicated BH server) to
accept prefixes larger than /32 (up to /25) in order to facilitate the
consolidation of some unused larger prefixes ?

Thanks
Fernando Frediani