On Jan 25, 2014, at 13:59 , Sander Steffann <san...@steffann.nl> wrote:
> Hi, > >> Yeah, its been a while since I had to get involved in this. We have a >> customer with their own IPv4 allocation that wants us to announce a /27 for >> them. Back in "the day", it was /24 or larger or all bets were off. Is >> that still the case now? > > This is still the case today. > > I wonder what will change (if anything) when ARIN runs out of IPv4 space. > Geoff's current predictions say Feb 2015, but I wouldn't be surprised if it > turns out to be sooner than that. But, when that happens ARIN will only have > the 'Dedicated IPv4 block to facilitate IPv6 Deployment' [1] left, and it > will use 'a minimum size allocation of /28 and a maximum size allocation of > /24' for that block. The block is meant for things like dual stacked DNS > servers, NAT64 and other IPv6 deployments where a bit of IPv4 is still > necessary. > > I wonder how reachable those systems will be... Will people adjust their > filters, or will most usage of this block (and thereby all new entrants in > the ISP market in the ARIN region) just be doomed? > That's actually may not be the best question. That block will come from within a specific prefix and I suspect that ISPs and the like will adjust their filters FOR THAT PREFIX. Consider the possibility of a policy change which allows the transfer of smaller blocks (current ARIN policy limits this to /24 minimum, but ARIN policy is not immutable, we have a policy development process so that anyone who wants to can start the process of changing it.) Owen
