Experimental Physics and
Industrial Control System

"J. Lewis Muir via Tech-talk" <[email protected]> · Mon, 6 Jan 2020 15:25:07 -0600

On 01/06, Mark Rivers via Tech-talk wrote:
> > Are any of the 10G links fiber?
> 
> I have tested with 2 different Linux machines.  On one of them the link from the Linux machine to the first switch is fiber, on the other it is copper.  Both fail the same way.  I have also tested 2 different devices that are connected to different 1 Gbit switches with (obviously) different cables.  So I don't think it is a defective cable or switch.  I would also point out that the problem is not at all random, it is completely deterministic.  Each time I send a specific packet I get a frame error on the NIC, which does not sound like collisions to me?

All of the packets are still going through the same 10 GbE switch,
though, right (i.e., the one labeled "10 Gbit switch #1" in the network
path diagram you included in a message upthread)?  So, that switch has
been involved in all of the tests conducted so far, so it still could be
the problem, right?

Also, are the 10 GbE switches labeled "10 Gbit switch #1" and "10 Gbit
switch #2" in the network path diagram identical and running the same OS
or firmware version, or are they different?

Lewis

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System