IPv6 BGP prefix filters

[Alistair Mackenzie <magicsata () gmail com>]

Hi,

So recently I've come across an issue with a large ISP announcing a /22 and
/25 of IPv6 space. We are currently filtering <28 and >48 which until now
has worked fine for us.

What are others using as their prefix filters in the DFZ?

Thanks,
Alistair