beboscky@yahoo.it wrote

I configured as a client with static IP but impossible to re-access to the interfice. to acces I have to reset it. firmaware version 2.1.1, but same problem with 2.1.6

Just to be sure: did you save the config after applying settings? If not, config is lost after next reboot, for example on a power outage.

Another cause of a CPE resetting itself can be an unstable main power supply and/or not grounding the outdoor device appropriately.

PS: that cpe connects to a wifi eduroam; it works with many APs, public and private antennas but not with the public one close to my home. It connects (leds on) but do not navigate even if with other device the internet is working directly connected to the public AP

If your account credentials are set up correctly in the CPE, it should work with any public EDUROAM AP.

beboscky@yahoo.it wrote

Thanks!Yes, config saved. The problem is that interface becomes invisible. It works. I need to reset it to re-acces it

Can't reproduce this - my CPEs never did lose their static IPs, not even once (and I use them for years now).

beboscky@yahoo.it wrote

PS: is client mode correct for connecting to eduroam ap? I configured as client and then with wired connection to PC.

Yes, client mode is correct. But depending on their policy, they probably might accept only direct clients or perform MAC address verification.

PS2: Ap is 110 meters from my antenna, can be 11db regional power limit the problem with internet connection?

This could be problematic for regular APs with omnidirectional antennas, but not for CPEs with directional antennas. Since the AP needs to send to the CPE, too, this indeed could be the cause of connectivity problems (we had similar type of problems with our EDUROAM AP over a larger distance, where our powerful 24dBi antenna could see the EDUROAM AP, but not the other way around).