[arin-ppml] Policy Proposal 102: Reduce and Simplify IPv4 Initial Allocations

William Herrin bill at herrin.us
Mon Nov 9 14:51:08 EST 2009

On Mon, Nov 9, 2009 at 2:24 PM, Ted Mittelstaedt <tedm at ipinc.net> wrote:
> William Herrin wrote:
>> But that's entirely beside the point. Single-homed entities require
>> zero routes in the DFZ to function as designed on a day to day basis
>> while multihomed entities require at least one. That was the point.
> Except that there are significant business/economic problems with it
> working the way your describing.
> While it is true that a single homed entity that qualifies under for
> a /20 CAN have their single upstream feed advertise that /20 under
> the upstream's AS, in practice this is almost never done.


You misrepresent my position. Single-homed ISPs who can't justify a
/20 generally consume -zero- routes in the DFZ today. Each one who
gets IP addresses under your proposal consumes at least one more route
than zero. Contrarily, multihomed ISPs each consume at least one route
in the table today, despite not getting addresses from ARIN. They're
likely to consume the same or fewer routes after getting ARIN
addresses and renumbering out of their ISP /24's (as required by your

I respectfully decline to debate whether /20 is a wise boundary above
which orgs should be able to get PI space regardless of multihoming.
Good or bad, it is the starting point from which your proposal is

>> If I hear different from the likes of Verizon and AT&T, I'll drop my
>> objection.
> Would you be willing to drop your opposition if you DON'T hear opposition
> from the likes of Verizon and AT&T?  After all, if they figure it isn't
> going to make much difference to the DFZ, then they have every incentive to
> remain neutral.

If I hear support from ISPs that are spending millions on DFZ routers
every year, I'll change my position to support. Otherwise, I'll
imagine myself in their shoes and ask: what would Bill Herrin want?

Bill Herrin wouldn't want to buy expensive new equipment any sooner
than he has to, especially not because someone else changed the rules.


William D. Herrin ................ herrin at dirtside.com  bill at herrin.us
3005 Crane Dr. ...................... Web: <http://bill.herrin.us/>
Falls Church, VA 22042-3004

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