[168461] in North American Network Operators' Group
Re: Will a single /27 get fully routed these days?
daemon@ATHENA.MIT.EDU (Owen DeLong)
Sat Jan 25 23:42:39 2014
From: Owen DeLong <owen@delong.com>
In-Reply-To: <1D452F18-4D66-4B11-B190-B508E7C4DD26@steffann.nl>
Date: Sat, 25 Jan 2014 20:36:33 -0800
To: Sander Steffann <sander@steffann.nl>
Cc: NANOG list <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On Jan 25, 2014, at 13:59 , Sander Steffann <sander@steffann.nl> wrote:
> Hi,
>=20
>> 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?
>=20
> This is still the case today.
>=20
> 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.
>=20
> 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?
>=20
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
