Hello, I am new here in the community and kindly ask for help with troubleshooting. It’s about a TS-431 where Network 1 is not working. Network 2 is OK, so at the moment I am only using the TS-431 locally via RJ45 cable for data backup to my PC. The LED on LAN port 1 does not light up when I plug in the RJ45 connector. I have done the 3-second reset. The latest firmware update 436.2805 has been installed. I can’t configure the network with QFinder Pro, as only one interface is shown to me and the menu Network & Switches for configuration is not available. I already suspect that network port 1 has a hardware defect, and I would consider switching to a new modern NAS, but I would really like to clarify this with you first. Possibly, network 1 is just disabled. However, I can’t access this configuration. Thank you very much for reading, Friedhelm
Hi and welcome to the forum. 
Please login to your NAS via SSH as the admin user, then run the following command:
ip a
… then post the result back here.
Is there anything in your device message log regarding Ethernet?
dmesg | grep -i eth
Good day, and thank you very much for your response with the test tasks,
which I have just completed.
ip a provides this information:
[~] # ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
2: eth0: <BROADCAST,MULTICAST,NOTRAILERS,UP,LOWER_UP> mtu 1500 qdisc mq state UP qlen 1000
link/ether 00:08:9b:eb:32:c9 brd ff:ff:ff:ff:ff:ff
inet 169.254.100.100/16 brd 169.254.255.255 scope global eth0
[~] #
The kernel does not output any messages regarding Ethernet via dmesg
Best regards, Friedhelm
Moved the whole mess to the German subforum, please pay attention to the language, it’s really not that hard.
Please open a support ticket so that our support team can investigate the matter in more detail!
(Translated with AI)
Yes, thank you very much for your help!
Yes, I will open a support ticket then.
Best regards, Friedhelm