Dear NANOG!

As many of you know, Team Cymru runs a free service delivering updated
BOGONS to networks around the world. We've been doing this for decades
at this point. For more information about this service, please see
https://www.team-cymru.com/bogon.

Recently, we've discussed internally a discrepancy between our BGP based
feed and the other formats we deliver for our Traditional BOGONS feed.
For historic reasons, we previously omitted delivery of some ranges that
are BOGONS from our BGP advertisements. We are considering adding the
below ranges back in, but want to hear feedback from the community on
these ranges prior to advertising them, out of an abundance of caution.

The below ranges are what we are currently considering advertising:
0/8 (this one we already have concluded is safe as it is already
advertised in our "FULL BOGONS" set.)
127/8
224/4
240/4

Note that 224/4 and 240/4 may be aggregated differently in our
advertisement, but are broken out here to facilitate discussion.

So, fellow NANOGers, what say ye? I would love to hear your feedback,
pro or con, well-reasoned with data points or general "argh! there be
dragons!" sentiments.

Looking forward to seeing folks in Hollywood for N86!

Cheers!

James

--
*James Shank*
Chief Architect of Community Services and Sr. Security Evangelist
e: jshank@cymru.com
o: +1 847 378-3365