[dns-operations] Limit on Name Servers & their IPs for a sub-domain

[Brett Watson]

All good points to be sure. I just hadn’t thought about it and wanted to pose the question :)


> On Jan 11, 2018, at 18:19, George Michaelson <ggm at algebras.org> wrote:
> 
> 11 servers. 11 labels. 11 named entities, each with a single IPv6 binding..
> 
> but in terms of 'distinct, autonomous, reachable entities, capable of
> supplying the root zone' .. its kind of moot what is, or is not a
> magic number here. What fits in the packet feels like a really bad
> constraint in some ways. If we move off UDP as a core dependency
> (which btw, is kind of a given if we go IPv6 only, because UDP+IPv6 is
> a horror story all of its own because of host-only fragmentation and
> pMTU) then why should we be subject to a proscriptive limit? What if
> DOH succeeds in volume and DNS priming moves to using TCP via CDNs
> instead?
> 
> I can recall somebody (John Crain? David Conrad?) saying back in a
> Dallas IETF (the one with the flood) that if you did anycast properly,
> you could do the root with one label.
> 
> I'm probably off in the room-of-one-person again, but I just don't
> feel like this number is either that important, or a very real
> constraint right now.
> 
> -G
> 
>> On Fri, Jan 12, 2018 at 10:32 AM, Brett Watson <brett at the-watsons.org> wrote:
>> On Jan 11, 2018, at 3:54 PM, Mark Andrews <marka at isc.org> wrote:
>> 
>> If we ever get to the state where the roots are IPv6 only, 11 servers will
>> fit.
>> 
>> 
>> First I’ve seen anyone do the math on this, and wondering did anyone think
>> of this and what’s the impact if in fact some day roots are v6 only? (I
>> certainly never thought about it)… maybe it’s come up on various lists and I
>> missed it but I don’t recall if so.
>> 
>> -b
>> 
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