Change ecm network interface

Hi,

I would like to create a bash script that executes commands on several FX30 connected to my development PC.
The problem is that all the FX30 connected to my pc expose the same IP address.

I have tried to change the ECM IP of the FX30s but this is not successful, as the FX30s go into an unstable state after setting this new IP.

Do you have a solution to connect several FX30 on the same PC and connect in SSH on it without having to plug and unplug them?

Regards

are you using linux PC to test?
Are you using configEcm command to change the IP address?

What do you mean by “this is not successful, as the FX30s go into an unstable state after setting this new IP”?
Are you able to ping each other?

you can also see here to use UART to setup PPP network interface with PC:

Yes, my PC is a linux.
when I configure a new ip via the ConfigECM command, I lose my ssh connection (which is normal), but the ping is not automatic afterwards. I have to wait several minutes, even disconnect my USB cable and reconnect it for the ping to work.

because of this problem, I can’t automate my process

Not sure if you need to type the following to disable the firewall:
iptables -I INPUT -j ACCEPT

does this IP still set correctly after reboot?