[arin-ppml] The role of NAT in IPv6

[Gary Giesen]

Because 65535 subnets isn't enough?

GG


On 10-04-06 2:14 AM, "Christopher Morrow" <christopher.morrow at gmail.com>
wrote:

> On Fri, Mar 26, 2010 at 6:23 PM, Gary T. Giesen <ggiesen at akn.ca> wrote:
>> Just a clarification on my comments, that's PI GUA space... Few
>> organizations will need more than a single /48, which would at least
> 
> as a clarification, any end site organization with more than a single
> office location is prone to want more than a single /48.
> 
> -Chris
> 
>> contain the number of prefixes being advertised. And with most ISP's
>> (LIR's) only requiring a single prefix for their own PA space, we should
>> a nice reset in table size, allowing hardware to catch up with routing
>> table growth.
>> 
>> GG
>> 
>> On Fri, 2010-03-26 at 18:05 -0400, Gary T. Giesen wrote:
>>> If that's a concern, then get GUA space out of the gate and you'll never
>>> renumber again. I believe GUA should be made cheap and relatively easy
>>> to get (instead of something using something like ULA and NATing it).
>>> 
>>> While some will argue this will lead to an explosion in the v6 routing
>>> table (and there is definitely merit to their argument), the aggregation
>>> gains from people who don't need the capability (especially residential
>>> customers) should more than offset it in the near term, buying time for
>>> for the technology to progress and offer us more TCAM slots to deal with
>>> it in the longer term.
>>> 
>>> GG
>>> 
>>> On Fri, 2010-03-26 at 17:54 -0400, Matthew Kaufman wrote:
>>>> Gary T. Giesen wrote:
>>>>> IMHO it's better to get people used to having no NAT at all (since
>>>>> they're getting used to a new protocol anyways)...
>>>> Please explain how you intend to eliminate manual renumbering for
>>>> corporate internal networks every time they change ISPs.
>>>> 
>>>> (And note that RA and even DHCP6 don't fix all the manual setup of
>>>> things like "what is the address of the intranet web server".)
>>>> 
>>>> There is a real cost to this, and the cost of a NAT device is pretty
>>>> much paid off the first or second time you're forced to renumber.
>>>> 
>>>> Matthew Kaufman
>>> 
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