Network is down and up

Installing and Using OpenWrt
1

I have a problem when I transfer files between my LAN and my DMZ, the interfaces are not accessible for 1 second, which interrupts my transfers.

Here are the logs:

Thu Jun 22 08:57:30 2023 daemon.notice netifd: Network device 'lan1' link is down
Thu Jun 22 08:57:31 2023 daemon.notice netifd: bridge 'DMZ' link is down
Thu Jun 22 08:57:31 2023 daemon.notice netifd: Interface 'DMZ' has link connectivity loss
Thu Jun 22 08:57:54 2023 daemon.notice netifd: Network device 'lan1' link is up
Thu Jun 22 08:57:54 2023 daemon.notice netifd: bridge 'DMZ' link is up
Thu Jun 22 08:57:54 2023 daemon.notice netifd: Interface 'DMZ' has link connectivity

Could the problem be due to the Cat8 cables on my Linksys E8450 (UBI) (1gb) router?

Every large transfer (several gigabytes or so), the interface disconnects and then reconnects correctly...

Any ideas on how to find the root cause of this problem?

2

Try different cables and test with another power supply.

3

Power supply for my Linksys ?

4

Yes, for the Linksys.

5

I changed the cables, always a problem

Capture d’écran 2023-06-23 084941

This time no down interfaces...

It's very difficult to find the problem

6

Hi

only possible solution for debugging is to place a plain/dumb switch between PC an OpenWRT

this way, you will see exactly on which side is a problem
maybe your PC lose connection on heavy transfer
maybe OpenWRT