The Reg does 240/4

Tue Feb 13 20:42:41 UTC 2024

Once upon a time, richey goldberg <richey.goldberg at gmail.com> said:
> They support /31s and have for some time.   The trick we found is that the Mikrotik has to be the higher numbered IP and network address has to be the lower

I would not classify that as "support /31s" - that's "there's a
work-around that handles 50% of cases".  Can you have two Mikrotiks
connected to each other with a /31?  If not, they don't support using
/31s.

-- 
Chris Adams <cma at cmadams.net>