[address-policy-wg] 2008-01 New Policy Proposal (Assigning IPv6 PI to Every Inetnum Holder)

> And how many get cancelled each year because they are not 
> being paid for, and if they do it's much easier to remove a 
> domain name from the internet. Unless there would be an 
> active system with signatures it's very hard to make sure 
> cancelled PI/PA blocks will disappear from the DFZ.

First of all, if a PI block is not paid for it will disappear
from RIPE's DB. I would expect many ISPs to have an internal
process for IPv6 Peering customers to regularly check the DB.

Also, there are a number of groups which regularly analyze BGP 
announcements looking for things like bogons and ghost-routes.
I would expect one or more of those groups to include unregistered
PI blocks in their reporting. A greater number of ISPs will
probably track these reports to make sure that they are 
following best practices.

--Michael Dillon