7i96 issue read/write

Right yes. Here it goes between, error queuing read and error finishing write. Almost sequentially but some cases the read error happens twice in a row. Since this happen on both 7i96 that I have it seems unlikely to be that, to me. I really don't think it is a physical issue with connectivity. It happens on two cables to two machines. I suspect the nic, or kernel strangeness. If anyone can recommend a pci intel card or chipset. I think I'd like to get one at least to rule out some things

The errors are odd in that they are both related to Ethernet transmit failing
(so unrelated to latency) I would not expect a kernel issue unless you changed
the kernel.

Are you using the10.10.10.10 IP address?

If you want to try a different NIC, I would choose a Intel based card

Yes. That was my impression too. I would need to double check the IP, its been a while since I configured these but I am 99% sure they are on 10.10.10.10 address. I will double check. Are there any particular intel nic chipsets that are recommended? I know they generally work well with Linux.

The reason I mentioned kernel is it seems similar to this, in my small amount of searching.  github.com/LinuxCNC/linuxcnc/issues/927

I haven't changed the kernel, no. But maybe I would benefit from an update of the master. I don't want to change that just yet.

Any Intel 100BT or 1000BT should be OK

The kernel error linked is a latency issue, This does not seem to be.

Right. No problem. I get you. Ill take a look to order a new NIC. I did confirm it is configured for 10.10.10.10 by the way. Ill report back any progress here. Thanks for help, j

I've ordered an intel pro 1000 GT pci NIC. Hopefully this does the trick. Whilst I'm at it, ill look to replacing the ethernet cabling just to be sure. Ill post back for ref next week. Ty