Suddenly can't ping machine on eth1

[cinereus]

I have a direct connection from my Windows PC to eth1 on my unraid box.

 

The Windows ethernet is set up as 192.168.0.22 and the unraid machine is set up as 192.168.1.250. They were pinging fine but now suddenly I can't ping either to or from the unraid box any more.

 

The weird thing is that Windows sees the connect and says it's enabled and up. And Unraid sees the connection too, they just can't speak to each other suddenly.

 

Here's my Windows and Unraid settings:

 

 

[itimpi]

You are likely to get better informed feedback if you attach your Unraid system’s diagnostics zip file to your next post in this thread.

[cinereus]

29 minutes ago, itimpi said:

You are likely to get better informed feedback if you attach your Unraid system’s diagnostics zip file to your next post in this thread.

 

fs-diagnostics-20231114-1721.zip

[itimpi]

The end of the syslog in the diagnostics shows the eth1 link continually showing as down and then shortly afterwards showing as up again.    I would be tempted to try rebooting your router in case the issue is at that level

[cinereus]

1 hour ago, itimpi said:

The end of the syslog in the diagnostics shows the eth1 link continually showing as down and then shortly afterwards showing as up again.    I would be tempted to try rebooting your router in case the issue is at that level

There's no router involved - it's a direct connection.

 

But even when it's up I can't ping. That's the main issue for now.

 

This is when the link is up:

 

Edited November 15, 2023 by cinereus

[JorgeB]

Last time it dropped it linked at gigabit speed only, suggesting some cable/NIC issue.

[cinereus]

Yeah but it's not currently dropped. It's currently connected. I still can't ping.

 

Before I could ping when connected and not ping (obviously) when dropped.

[cinereus]

It's currently been up for several hours in a row and still can't ping in either direction.

[JorgeB]

The fact that is not linking at the correct speed suggests an issue, if possible try with different cable/NICs.

[cinereus]

I have changed to a new dedicated 1 Gbps port which still has the same issue. It says connected but won't ping.

[JorgeB]

Is this still the direct connection? Is the main eth0 working?

[cinereus]

36 minutes ago, JorgeB said:

Is this still the direct connection? Is the main eth0 working?

Yes. eth0 works completely fine.

 

Very strangely, what seems to have fixed it is moving over from 192.168.1.x to 192.168.2.x.

 

No idea what the issue was there....