I have successfully estabished a client-server relation between two RUT140s, but the thing is although it is supposed to be a WDS, it does not act like one. For example I am trying to connect remote nodes running Profinet in the two ends of the wireless bridge. The IP/Ethernet communication runs just fine, but the actual Profinet communication isn’t there, which pretty much tells that the WDS doesn’t really do its thing that is to operate at Layer 2 - purely MAC address based. Any ideas?
Just to clarify - you configured actual WDS, not Relayd?
Did you try packet capture with TCPdump on both ends to see if the packets truly get lost in the wireless bridge?
Yes, I did configure actual WDS, an not a relayed DHCP. Packets don’t get lost as such, as I said in my original post TCP transmission as well as protocols that operate at the higher layers, like EthernetIP/Modbus TCP and those alike - work just fine. Profinet though doesn’t. And it should, due to WDS alleged operation at layer 2 MAC level. I should mention that few years back (3 or 4) I had done identical setup (WDS) with 2 x RUT955s and it worked flawlessly even with ProfiSAFE, let alone clean Profinet
Could it have something to do with whether the WDS on a RUT140 works in repeater rather than bridge mode?
Sorry, I meant frames, not packets. TCPdump should capture layer 2 traffic as well.
As for WDS - I’m not certain. From what I understand, WDS works on the wireless driver level.
It may be worth trying to configure Relayed instead, which is based on IPtables rules. It should relay layer 2 traffic as well and perhaps it will handle Profinet differently.
If that doesn’t help, then the best bet might be to wait for someone from Teltonika to take a look
Hello @kalenjiev,
Have you tried configuring Relayd instead, as suggested by @abcd ? Also, could you clarify what devices or remote nodes running Profinet you are using, and just to confirm, they are connected to the routers via Ethernet, right?
If Profinet communication still does not work after configuring Relayd L2 bridge, you might try creating a VLAN ID 0 and selecting the eth0.0 interface under the pysical LAN (br-lan) settings, as described in the topic here:
Please let us know how it goes.
Best regards,
Hello.
I played with the routers more than 10 hours yesterday and have concluded that the problem is totally not in the WDS bridge. It is in the router itself. I omited the 2 router solution and connected a single RUT140 to the profinet network via its LAN port and then connected my laptop to that RUT140 via WiFi. Under no circumstance could I see anything in the profinet network - not a single node! Then I tried all combinations of VLAN configurations with eth0.0, eth0.1, both and so on … nothing worked. On top of that, when I assigned the LAN to eth0.0 with VLAN 0, I could only ping the router itself and nothing else (whereas in the rest of the scenarios, I ping all nodes, I have IP communication, but not Profinet, i.e. not layer #2).
Then I grabbed an Asus domestic router with OpenWRT which I had lying around - it worked like a charm, without me having to modify absolutely anything.
To my understanding the WiFi-Eth0.1 bridge is not a proper Layer #2 bridge, but something emulated somehow. But that you’d definitely know it better than me. In any case, I know with certainty that this works on RUT955 with firmware 3-4 years old, since I’ve done multiple number of these and they still work. As far as I can recall, I haven’t done any special configurations on those RUT955s back then - it worked out of the box.
I hope a solution pops up soon, since we’ve ordered 20 pieces of this RUT140, which I for now can only deem useless…
Hello,
Thank you for your update and calling us.
In this case, I believe to assist you effectively, we’ll need to continue this process privately, because sensitive/publicly no-shareable information, such as the troubleshoot file, configurations, logs, etc., needs to be collected.
You should find a support request form in the inbox of the email address you used for your forum registration. Kindly fill out the form, and please reference Ticket ID: 15762 when submitting it. Once the form is completed, we’ll contact you directly via email to investigate the issue in detail and help work towards a solution.
Best regards,
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