[c-nsp] smaller PI

[sthaug at nethelp.no]

> IIRC, even when I wrote that, there were one or more /8s from which RIPE 
> said the longest prefix they'd allocate was >24.  91/8, 193/8, and 194/7 
> are all listed as longest prefix = /29!  When I wrote the filter 
> referenced above, I chose to ignore this and filter these ranges denying 
> /25 and longer.
> 
> Does RIPE really expect everyone to accept BGP routes as long as /29?

Maybe they do. But it's not likely to happen on a universal scale. We
filter at /24 and have no plans to change.

> I just checked our BGP feed from Level3, and they're not sending us 
> anything longer than /24.

We're receiving /25s and /26s from Global Crossing. Which we promptly
drop in the bit bucket.

Steinar Haug, Nethelp consulting, sthaug at nethelp.no