i have my hands on teltonika rutx12 for few days for testing. I need it to work this way:
I have 4 houses with security cameras + alarms and want upload data to FTP server. But if send all houses to 1 SIM, i will exceed data limit, so for my case this dual sim teltonika rutx12 seems to be perfect solution, because i can divide 2 houses to SIM1 and 2 houses to SIM2. At other side there is an synology ftp server.
I get that Teltonika, tried to configure it the best i Can, set APN, port forward to synology, set load balance to 50/50 between the 2 mobile interfaces.
Also i have set within advanced static routes via Look table and rules that any device from this network will use modem 1 for going out to network. (but my case was even before this setup)
Its working this way:
If i start uploading data from house 1 to SIM1, its working. If i connect house 2 to SIm1, its working, everything is going to FTP. But when i start uploading house 3 to SIM2, everything crashes, modem1 gets disconnected and tries to re-connect, modem 2 will not even start upload to FTP. This goes on until i cancel upload to SIM2, then, after while, modem 1 re-connects properrly and continues uploading.
I have tired to stop upload to SIM1 and force upload only to SIM2, but it also would not start, its like the second modem couldnt find its way to synology, or is fighting with modem 1.
In port forwarding its set that from any WAN IP, to any router IP, everything sent to synology at port 21.
If i tired to make separate VLAN for interface lan2, and setp up that this interface will use modem 2 to going out to network, it was working well. PC1 gets out through modem 1 and PC2 through modem 2. So modems are working, separatelly. But when the router needs to merge data from both modems to single output (synology), then its not working.
Any idea why is this happening?