TRB245 Network Connectivity Challenge

[kevink]

I have 5 TRB235 Units running via GSM SIM. The network provider has given me a private APN which assigns each sim card an IP address under the same range. I.e. Sim 1 to Sim 5 run the same subnet i.e. 10.100.0.1 – 5.

My current setup is to use one TRB as the server and the other as clients and use the LAN port of the TRB to connect a unit that should communicate with the different units connected to the other TRB.

TRB1	SIM IP VIA PRIVATE APN – 10.100.0.1	DEVICE CONNECTED VIA LAN PORT – 192.168.0.1
TRB2	SIM IP VIA PRIVATE APN – 10.100.0.2	DEVICE CONNECTED VIA LAN PORT – 192.168.0.2
TRB3	SIM IP VIA PRIVATE APN – 10.100.0.3	DEVICE CONNECTED VIA LAN PORT – 192.168.0.3
TRB4	SIM IP VIA PRIVATE APN – 10.100.0.4	DEVICE CONNECTED VIA LAN PORT – 192.168.0.4
TRB5	SIM IP VIA PRIVATE APN – 10.100.0.5	DEVICE CONNECTED VIA LAN PORT – 192.168.0.5

The drawing below indicates my setup.

The devices connected via the LAN Port will have a static IP within the range indicated and should communicate together [ Able to ping each other and also from TRB1 Acting as a server] seamlessly as if all were connected to a single switch.

What is the best protocol to use whilst using the TRB245

[Marijus]

Hi,

If you’re using TRB245s for ports other than Ethernet, communication methods vary. For instance, if you have Ethernet devices connected to TRBs (not using the I/O panel), you can simply switch your mobile interface to bridge/passthrough mode. Then, the end device will use the static IP that TRB245 originally had. Alternatively, you can use VPN to connect each TRB245 device as LAN devices.

Best regards,

[kevink]

Do you have any VPN recommendations that would work using my network scenarios

For now I have used the below
L2TP over IPsec - Teltonika Networks Wiki (teltonika-networks.com)

IPsec - This is working and the “ServerTRB” can connect to “ClientTRB”
L2TP - This is working and the “ServerTRB” are able to ping each other “ClientTRB”

My challenage is if I do connect a device on the ethernet port of “ClientTRB” I am unable to ping any of the L2TP or TRB physical/LAN IP addresses. Could this be a routing or forwarding issue?