On Mon, 4 Apr 2016, David Huberman wrote:

1) It's a trade-off, right? A network operator who absolutely must have a 2-byte either has equipment that hasn't been updated in 6+ years, or is having an issue like BGP communities where the solution they want to implement requires a 2-byte (rather than what Owen is talking about). Their network, their rules. So if they want a 2-byte, and ARIN has inventory of 2-bytes -- but they're found in the DFZ -- that requires the network operator to make a decision.

If both networks point default at a transit provider, traffic exchange can still work...but as Job said, they will (by default) ignore each other's routes regardless of how many AS-hops separate them.

2) ARIN staff (me!) spent many years trying to get upstreams to help us deal with the backlog of ASNs which were (from a Registry perspective) being squatted on. And these arent published in Whois btw. But it was simply too much volume to handle. The upstreams are primarily concerned with profit, and customer relations, and this was very much a low priority. Then add in high volume for 7018 or someone like that, and it became completely untenable. In your scenario, it's less volume. But success in this path is not an expectation I would want to set for anyone who is fine taking a routed ASN.

If ARIN has a large pool of ASNs which it believes ARIN is responsible for, and are not being paid for, i.e. ASN squatters, then WTH are these ASN's not published in whois as Unused/Reserved/Reclaimed/whatever term/language ARIN comes up with that clearly identifies the ASN as not belonging to whoever might be trying to use it? That just might help deter transit providers from allowing customers to use them. An automated periodic email to peeringdb/whois contacts for the immediate upstream ASNs would at least notify/remind networks that they're providing transit to an org squatting on an ASN.

----------------------------------------------------------------------
 Jon Lewis, MCP :)           |  I route
                             |  therefore you are
_________ http://www.lewis.org/~jlewis/pgp for PGP public key_________
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