Experimental Physics and
Industrial Control System

"J. Lewis Muir via Core-talk" <core-talk at aps.anl.gov> · Wed, 17 Mar 2021 09:11:43 -0500

On 03/17, Torsten Bögershausen via Core-talk wrote:
> The paper says "IPv6 only", right ?
> In order to get an idea what needs to be done, I imagined that the switches don't transport
> IPV4 any more.
> Those switches do probably not exist in reality. You need to imagine them.
> There are not datasheets, they do not exist.
> 
> Imagine them.

The point is that it doesn't make sense to imagine them; they will never
exist.  I haven't read the paper or memo or whatever it is, but if it's
talking about a requirement to move away from IPv4 to IPv6, then it's
limited to just the things that are IPv4, not things that are not IPv4.
It doesn't say that something that is not IPv4 must be converted to
IPv6; that would be ridiculous.  I think that's the point that's trying
to be made here about the switch: a traditional network switch is a
layer 2 device (i.e., data link layer); it doesn't know anything about
communications schemes from layer 3 and up (IPv4 and IPv6 are at layer
3), and therefore would have no way to disallow IPv4.

Lewis

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System