Experimental Physics and
Industrial Control System

Michael Davidsaver via Tech-talk <[email protected]> · Sat, 4 Jan 2020 21:26:18 -0800

On 1/1/20 10:31 AM, Mark Rivers wrote:
> So the problem appears to be that some frames from the device give “frame” errors on 10 Gbit NICs, whereas they do not on 1 Gbit NICs.  However, some frames from the device do not give frame errors they are received fine even on the 10 Gbit adapters.
> 

Your original message mentions a switch.  Is this still present?  If so, have you checked
what link speed is negotiated between this switch an the device?

If not, have you used 'ethtool' to check that the NIC is actually negotiating 10Mbps?

For that matter.  Maybe this dinosaur can't handle full-duplex?

> Any idea what can cause that?

On 1/1/20 9:42 AM, Mark Rivers wrote:
> They are very old devices (early 1990’s).  They are 10-Mbit with AUI connectors. 

Is the AUI from the early 1990 as well?  As I recall, an AUI is an active device.
So you might have some luck replacing it with something newer (late 90's).

I don't suppose you have an old 10Mbps hub around?
I used to have one which I kept to snoop on the device side of a
switch I was suspicious of.

Beyond this, I'm out of ideas.  You might be stuck using an older host to
talk to this device.  (30 years is a long time to maintain compatibility)

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System