Re: AWS Elastic IP architecture

[Matthew Kaufman <matthew () matthew at>]

On 6/1/2015 12:12 PM, Christopher Morrow wrote:
> On Mon, Jun 1, 2015 at 1:49 PM, Matthew Kaufman <matthew () matthew at> wrote:
> > 1) An all-IPv6 network inside, so the hosts can all talk to each other over
> > IPv6 without using (potentially overlapping copies of) RFC1918 space...
>
> this point keeps coming up... I don't see that 'overlapping ipv4'
> matters at all here. it is presented to the customer (vm oeprator) as
> 'a flat-ish lan' where you poke from machine to machine via names.
>
> (so it seems like a rathole/FUD-problem we can just stop talking about now)
>
> -chris

I have deployed services in clouds where the overlapping RFC1918 space 
did present challenges to the software stack that was trying to exchange 
node reachability as IP/port. So yes, there were and still are cases 
where existing software that is not aware of potential overlapped 
assignments can break.

Matthew Kaufman