Ip router/interface disappearing whenever I turn on LM5

[Ceros2112]

Hello,

I see a strange behaviour, I have a LM5 with an ABB IP router, turning on the LM5 cause the IP router to disappear for a while (it depends, it could be 3 or 4 minutes or more), I even tested with a gewiss ip interface, same problem.

That's strange...I haven't seen this behaviour before, any ideas of what could be?

The FW version of LM5 is 20230607

[Ceros2112]

More info, if I go directly into a switch no problem, but if I go through the company LAN (and so switch managed and firewall) it happens, but only after I reboot the device. Maybe the firewall is doing something wrong?

[Daniel]

Is the IP router connected to the same TP? If yes then you have KNX loop as LM is also a router with all filters opened by default.

[Ceros2112]

No, LM5 is connected only via ethernet