What is the actual goal? Keep anyone state it in exact terms? In past decades the Ethernet was a shared medium where every device was exposed to every packet sent by any other device. This was back in the time when we used coaxial cables. Then twisted pair Ethernet was invented but we all used "hubs" that simply retransmitted any incoming packet to every other port. This simulated the way coaxial networks worked. Then maybe 20 years ago? We started to use "Ethernet switches". These devices look at the packet header from each inbound packet on each port and only send it out the port it is addressed to. So on a modern Ethernet, a device like a Pi4 or MESA 7i92H never sees Ethernet packets that were not sent to it. OK, there are some broadcasts that are sent to every device. But simply using a modern switched Ethernet gets a LONG ways to an isolated network. My gues is the advice to use dedicated network hardware comes from the era before network switches where common
So again, what exactly is the goal? Maybe the goal is not to delay outbound traffic from the Pi4 to the MESA 7i92H? So if the Pi4 is sending data to some web server we do not want our web surfing to be queued ahead of the LCNC related commands. But do you get this effect by installing a second Ethernet port? I doubt it. The only queue in the system is inside the Linux OS. It would be good to know EXACTLY what the problem is, On Sun, Mar 6, 2022 at 8:30 AM Alan Condit <condit.a...@gmail.com> wrote: > Robin, > > I have a USB3 to Ethernet adapter to use on my Pi4. I intend to use the > onboard Ethernet for my 7i76e and the USB/Ethernet for the internet. > > Alan > > From: Robin Szemeti <ro...@redpoint.org.uk> > > To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net > > > > Cc: > > Bcc: > > Date: Sun, 6 Mar 2022 11:35:56 +0000 > > Subject: Re: [Emc-users] Pi4 with LinuxCNC and MESA 7i92H > > The Pi4 and a Mesa ethernet card seemed like a brilliant idea when I > bought > > mine ... I now regret it. The networking nightmare it has caused is > > painful. There is no WiFi down in my shed, only wired ethernet, so I had > > to put in a WiFi to ethernet bridge, connectivity is odd, sometimes it > > appears on the network, sometimes it doesn't. > > > > Any bright ideas on how to add a second ethernet port to the Pi? > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > -- Chris Albertson Redondo Beach, California _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
