[172374] in North American Network Operators' Group
Re: Credit to Digital Ocean for ipv6 offering
daemon@ATHENA.MIT.EDU (Grzegorz Janoszka)
Tue Jun 17 16:36:59 2014
X-Original-To: nanog@nanog.org
Date: Tue, 17 Jun 2014 22:36:49 +0200
From: Grzegorz Janoszka <Grzegorz@Janoszka.pl>
To: nanog@nanog.org
In-Reply-To: <FAA47504-A079-4F68-9C21-CCCBB909AAD4@virtualized.org>
Errors-To: nanog-bounces@nanog.org
On 2014-06-17 22:13, David Conrad wrote:
> On Jun 17, 2014, at 12:55 PM, Grzegorz Janoszka <Grzegorz@Janoszka.pl> wrote:
>> There are still applications that break with subnet smaller than /64, so all VPS providers probably have to use /64 addressing.
>
> Wouldn't that argue for /64s?
/64 netmask, but not /64 for a customer. There are application which
break if provided with /80 or /120, but I am not aware of an application
requesting /64 for itself.
>> /64 for one customer seems to be too much,
>
> In what way? What are you trying to protect against? It can't be address exhaustion (there are 2,305,843,009,213,693,952 possible /64s in the currently used format specifier. If there are 1,000,000,000 customer assignments every day of the year, the current format specifier will last over 6 million years).
Too much hassle, like too big config of your router. If you have 1000
customers in a subnet, you would have to have 1000 separate gateway IP's
on your router interface plus 1000 local /64 routes.
--
Grzegorz Janoszka
